On-Board Diagnostic Test Reference

Table of Contents

Purpose

This reference provides both a summary of pass/fail standards for the On Board Diagnostic (OBD) test portion of a Smog Check inspection and instructions for inspecting vehicles with known OBD test difficulties. This reference replaces the Smog Check OBDII Reference (Testability Issues) document that was formerly known as Appendix J.

This document includes guidance related to vehicles that must obtain recall service before a Smog Check inspection can be successfully performed. Certain vehicles may be eligible to be repaired under manufacturer emissions warranty. Recall and warranty information is available by contacting the California Air Resources Board helpline@arb.ca.gov or (800) 242-4450 or https://ww2.arb.ca.gov/frequently-asked-questions.

This document provides guidance to Smog Check inspectors on when to send certain vehicles to a Referee for inspection. The Referee stations are State run and have the expertise and equipment necessary to resolve unique situations. Referee Centers are located throughout California. To find a Referee Center near you or to schedule an appointment, visit asktheref.org or call (800) 622-7733.

Note:

  • The correct vehicle identifying information (e.g., VIN, make, model, and certification type) must be entered into the BAR-97 and the OIS in order to receive a special test configuration. This guide includes vehicles where the OIS or BAR-97 inspection has been modified to accommodate certain vehicle design anomalies via modified pass/fail standards, disabled test modules, or OBD data collection.
  • Service bulletins and recalls referenced in this document may be obtained by contacting your vehicle manufacturer, aftermarket publisher (e.g., Identifix, Alldata, etc.), or OBDclearinghouse.com.

Revision Table

Revision Number Revision Description Revision Date
1.0 Original. 9/1/2015
1.1 Added: BMW; Lexus RX400; Toyota Highlander; VW Passat. 9/25/2015
1.2 Added: Chevrolet and GMC box trucks; Freightliner M Line; Mitsubishi Fuso. 11/13/2015
2.0 Added: Table 5 with BAR-97 vehicles; Audi A4, A6 bulletin; Ford E350; VW Passat bulletin. 1/22/2016
2.1 Added: BMW 323i; Chevrolet Cavalier CNG; Chrysler PT Cruiser; Infinity I30; Kia Borrego; Nissan Maxima; Nissan UD1200; Silverado 1500; Silverado 2500 diesel; links to bulletins; ARB’s number. 3/11/2016
2.2 Added: Chevrolet: C/K2500, C/K3500, G30, G3500, Sport Van, Cargo P30; Ford: F250, F350, E350, E450, E Super Duty, Econo Comm S-Duty, RV S-Duty; GMC: C/K2500, C/K3500, G3500, Workhorse P30; Dodge: Ram 2500, 3500; DCX Sprinter. 9/2/2016
2.3 Updated: Chevrolet 2001 Silverado / Tahoe C/K 1500, 2002 C/K 2500HD (diesel). Added: BMW 2003 M3; Volvo 2000 S40 / V40; Mazda 2000 MPV. 10/31/2016
2.4 Added BMW: 323i Sedan, 323iT Touring, 323Ci Coupe, 323 Cic Convertible. Model years: 6/99-7/00. w/M52 engine, model year 2000. Updated Volvo S40 / V40 model year 2000. 12/2/2016
2.5 Updated Chrysler 2003 PT Cruiser. 1/20/2017
2.6 Added: Ford/Lincoln Explorer, Edge, MKX. 2/15/2017
2.7 Reinserted: 2000-2001 Nissan Maxima. 4/21/2017
2.8 Continuous Monitors, footnote added to table 1. 8/25/2017
2.9 Added: Kia Borrego Drive Cycle Bulletin; Updated Table of Contents. 11/28/2017
2.10 Updated 2009 Borrego; Updated 2002 Silverado C/K 2500HD (diesel); Added 2004-2006 Dodge/Daimler Sprinter 2500 3500 (diesel); Added 2004-2006 Freightliner Sprinter (diesel); Added 2002 GMC Sierra C/K 2500HD (diesel). 12/15/2017
2.11 Added owner recall letter for 2004-2006 Freightliner Sprinter (diesel). 1/12/2018
2.12 Added 1996 Mercedes-Benz C220, E320, C280, S320, SL320. Added 2010-2011 Jeep Wrangler 3.8. 4/13/2018
2.13 Updated 2004-2006 Dodge Sprinter (diesel). 6/8/2018
2.14 Updated 2010-2011 Wrangler 3.8L. 9/7/2018
2.15 Added Chrysler 1999-2000 Town & Country, Dodge 1999-2000 Caravan, Plymouth 1999-2000 Voyager. 10/12/2018
2.16 Added 2007 BMW 328i. 3/8/2019
2.17 Added Table 3.5 and Table 6: Permanent DTC Vehicles of Concern. 4/26/2019
2.18 Added 2010-2013 Mercedes 350 Bluetec. 6/14/2019
2.19 Updated 2004-2006 Dodge and Freightliner Sprinter (diesel). 1/14/2020
2.20 Updated Table 6: Permanent DTC Vehicles of Concern with 2010-2012 Audi Q7 and 2010-2012 VW Touareg issue. Made Table 6 in alphabetical order based on vehicle make. 5/1/2020
2.21 Added 1998-2002 Dodge Ram Truck 5.9L to Table 4. Updated 2004-2005 Dodge Ram Truck 5.9L(Cummins diesel) in Table 4. Added: 2017-2019 Chrysler Pacifica Hybrid to Table 6. 6/5/2020
2.22 Added 2021 Ford E/F 350 & E/F 450 Cutaway / Stripped Chassis 7.3L gasoline (many are ambulances). 7/27/2020
3.0 Converted document to HTML compatible format. Table 3 and 3.5 have been retitled to 3a and 3b. Cause and Instruction updated in Table 6 for Chryser, Dodge, Freightliner, Jeep, Mercedes, Ram 9/8/2020

Pass/Fail Standards for the OBD Test Portion of a Smog Check Inspection

Readiness monitors are self-tests performed by the vehicle’s OBD system to verify emission control functionality. While most vehicles complete the various readiness monitors during normal driving, other vehicles have more trouble either because the vehicle design requires unusual operating conditions or because the owner rarely drives the car in the necessary operating mode. On occasion, the vehicle owners-manual contains driving procedures to complete the monitors, but usually this drive cycle information is only available to the OEM or found in repair industry service literature. Since drive cycles require the vehicle experience specific operating conditions: speed, temperature, pressure, engine load, etc., performing certain drive cycles may not be possible in traffic, yet could be performed using dynamometer equipment. Monitor completion is also dependent on properly functioning components, so a vehicle may never complete a monitor until a thorough diagnosis and repair of components enabling the monitor to run is performed. Readiness monitors must be rerun after a repair activity like disconnecting a vehicle’s battery or replacing a defective emissions component.

Table 1 below shows the typical number of incomplete OBD readiness monitors that are allowed to pass the OBD test portion of a Smog Check inspection. See the Table 4: OIS Vehicles of Interest, and Table 5: EIS Vehicles of Interest, for vehicles that have modified standards.

Table 1: OBD Test Monitor Readiness Standards

(Implemented May 4, 2015)

Model Years Fuel Type Number of Incomplete Monitors
Allowed to Pass OBD Test
1996-1999 Gas 1 Any one 2
2000 and newer Gas 1 Evaporative system 2
1998-2006 Diesel Zero
2007 and newer Diesel Any two

1 "Gas" includes gasoline, propane, natural gas (CNG, LNG, LPG)

2 The continuous monitors (misfire, fuel, comprehensive components are ignored during OBD test of "gas" vehicles).

Table 2: OBD Test MIL Standards

Table 2 below shows the current Malfunction Indicator Lamp (aka: "Check Engine" light or MIL) related failure criteria for the OBD test portion of a BAR-97 and OIS inspection.

Vehicles Pass/Fail Standard
All with OBDII Pass MIL illuminates when key on engine off (KOEO).
All with OBDII Pass MIL turns off when engine running (KOER).
All with OBDII Fail MIL does not illuminate when key on engine off (KOEO).
All with OBDII Fail MIL illuminates when engine running (KOER).

Table 3a: OBD Test Communication Standards

Table 3a below shows the BAR-97- and OIS-to-vehicle communication standards. Vehicles fail for no communication for a variety of reasons. Common reasons include but are not limited to: damaged OBD connector or wiring, aftermarket stereo, transmission computer response instead of engine computer response, and invalid data from the vehicle.

Model Years BAR-97 or OIS Standard
All with OBDII BAR-97 Vehicle communicates with BAR-97.
All with OBDII OIS Vehicle communicates with OIS
and transmits required data. 1

1 Required data typically means data from OBD addresses: Mode $01 PID $00, Mode $01 PID $01. Mode $01 PID $00 returns what data is supported on the vehicle. Mode $01 PID $01 returns MIL status, diagnostic trouble codes (DTCs), and monitor status.

Table 3b: Permanent Diagnostic Trouble Code Standards

On July 1, 2019, a Permanent Diagnostic Trouble Code (PDTC) check was added to the BAR-OIS Smog Check inspection. PDTCs are the same as regular diagnostic trouble codes (DTC), but they cannot be erased by clearing the DTCs with a scan tool or by disconnecting the vehicle’s battery. PDTCs can only be cleared by the OBD II system once it has verified that the previously identified defects are no longer present.

Model Years BAR-97 or OIS Standard
1996-1999 BAR-97 Not applicable.
2000-2009 OIS Not applicable.
2010 & Newer. 1 OIS Vehicles fail when a PDTC is
present. 2,3,4,5

1 Some 2010 vehicles do not support PDTC. Those without support for PDTC will not be subject to the PDTC check.

2 A vehicle with a PDTC stored will fail the PDTC check regardless of whether the MIL is commanded ON or OFF.

3 PDTC presence will be ignored if the vehicle has completed at least 15 warm-up cycles and been driven at least 200 miles since its OBD information was last cleared (as determined by Mode $01 PID $30 and $31).

4 BAR is aware of some vehicles that have trouble properly clearing certain PDTCs. BAR is working with the California Air Resources Board (CARB) to ensure that known problematic vehicles are addressed by vehicle manufacturers. Until then, these codes will be ignored by BAR-OIS. See Table 6 for a list of these vehicles.

5 Vehicle manufacturers have issued extended warranties, recalls and repair campaigns for some vehicles that have trouble properly clearing PDTCs. These vehicles will be listed in Table 6. When one of these vehicles fails for the PDTC listed in Table 6, please refer the motorist to the dealer for covered repairs.

OIS Vehicles of Interest

Table 4 below includes 2000 and newer model-year gasoline and flex-fuel vehicles (and 1998 and newer diesel vehicles) that have known pattern issues with the OBD test portion of an OIS inspection. Issues include but are not limited to: no communication with the vehicle, incomplete readiness monitors, OBD test incompatibility, and false MIL illumination. In most cases, the OIS inspection is programmed to accommodate vehicles with a design anomaly. In other cases, the vehicle may require repair.

Table 4: OIS Vehicles of Interest

Make Year Model
Engine (L); Fuel Type
Issue Cause and Possible Remedy Instruction to Inspector
Audi 2000-2004 A4 & A6 Fail for no OBD communication. No response or Only Transmission Control Module responds to DADs requests. ABS and/or brake lamp illuminated in instrument panel cluster. Broken ground bond wire in ABS module causes diagnostic communication issues with the ABS module, ECM, and TCM. Diagnose and repair per Audi TSB #A45-15-10. Likely Broken Vehicle; Repair and Retest.
BMW 6/1/99 – 7/31/00 323i Sedan May not pass inspection due to oxygen sensors readiness monitor not set/not fitted/not supported. DME Software error.
Reprogram DME with the updated software.
Check the DME “programmed control unit” number listed in TSB #SI B12 16 16 and follow TSB instructions.
BMW 9/3/99 – 7/31/00 323iT Touring May not pass inspection due to oxygen sensors readiness monitor not set/not fitted/not supported. DME Software error.
Reprogram DME with the updated software.
Check the DME “programmed control unit” number listed in TSB #SI B12 16 16 and follow TSB instructions.
BMW 6/1/99 – 7/29/00 323Ci Coupe May not pass inspection due to oxygen sensors readiness monitor not set/not fitted/not supported. DME Software error.
Reprogram DME with the updated software.
Check the DME “programmed control unit” number listed in TSB #SI B12 16 16 and follow TSB instructions.
BMW 6/23/99 – 7/29/00 323 Cic Convertible May not pass inspection due to oxygen sensors readiness monitor not set/not fitted/not supported. DME Software error.
Reprogram DME with the updated software.
Check the DME “programmed control unit” number listed in TSB #SI B12 16 16 and follow TSB instructions.
BMW 2000 M52 (TU) engine May not pass inspection due to oxygen sensors readiness monitor not set/not fitted/not supported. DME Software error.
Reprogram DME with the updated software.
Check the DME “programmed control unit” number listed in TSB #SI B12 16 16 and follow TSB instructions.
BMW 2000 Fail for readiness. Vehicle may not set oxygen sensor readiness monitor. Software error in ECM.

Reflash ECM per Recall #00E-A01. See BMW bulletin #SI B 12 15 99, dated November 2000.
Vehicle requires reflash. Reflash ECM per recall so oxygen sensor monitor will set.
BMW built 3/98 - 7/99 323i, 323iA, 328i, 328iA Fail for readiness. Vehicle may not set oxygen sensor readiness monitor. Software error in ECM.

Reflash ECM per Recall #00E-A01. See BMW bulletin #SI B 12 15 99, dated November 2000.
Vehicle requires reflash. Reflash ECM per recall so oxygen sensor monitor will set.
BMW built 2/99 - 7/99 328iC, 328iCA, 323iC, 323iCA, 528i, 528iA, 528iT, 528iAT Fail for readiness. Vehicle may not set oxygen sensor readiness monitor. Software error in ECM.
Reflash ECM per Recall #00E-A01. See BMW bulletin #SI B 12 15 99, dated November 2000.
Vehicle requires reflash. Reflash ECM per recall so oxygen sensor monitor will set.
BMW built 9/98 - 7/99 Z3 roadster 2.3 Fail for readiness. Vehicle may not set oxygen sensor readiness monitor. Software error in ECM.

Reflash ECM per Recall #00E-A01. See BMW bulletin #SI B 12 15 99, dated November 2000.
Vehicle requires reflash. Reflash ECM per recall so oxygen sensor monitor will set.
BMW built 4/99 - 7/99 Z3 roadster coupe/ roadster 2.8 Fail for readiness. Vehicle may not set oxygen sensor readiness monitor. Software error in ECM.

Reflash ECM per Recall #00E-A01. See BMW bulletin #SI B 12 15 99, dated November 2000.
Vehicle requires reflash. Reflash ECM per recall so oxygen sensor monitor will set.
BMW 2001-2003 Z3 M Roadster/coupe with S54 engine Fail for no communication when ignition switched off/on.

OBD communication always possible with BMW DIS or GT1 tester.
Voluntary Emissions Recall Campaign to reprogram the engine control units (DME) on all affected vehicles.
Bulletin #SI B12 11 06 dated October 2007.
Follow OIS prompts - connect/disconnect DAD when key off.
BMW 2000-2003 Z8 & M5 with S62 engine Fail for no communication when ignition switched off/on.

OBD communication always possible with BMW DIS or GT1 tester.
Voluntary Emissions Recall Campaign to reprogram the engine control units (DME) on all affected vehicles.
Bulletin #SI B12 11 06 dated October 2007.
Follow OIS prompts - connect/disconnect DAD when key off.
BMW From series intro. up to 8/27/2004 M3 with S54 engine Fail for no communication when ignition switched off/on.

OBD communication always possible with BMW DIS or GT1 tester.
Voluntary Emissions Recall Campaign to reprogram the engine control units (DME) on all affected vehicles.
Bulletin #SI B12 11 06 dated October 2007.
Follow OIS prompts - connect/disconnect DAD when key off.
BMW 2003 M3 Failure to set EGR monitor. Check thermostat Likely broken vehicle;
Repair and Retest.
BMW 2007 328i Engine dies during OBD Test, won’t restart. Separate the vehicle and key. Wait 20+ minutes. Attempt to restart. Test normally.
BAR-OIS will not request Cal ID or CVN. Possible keyless ignition related issue. The vehicle will recover by just letting it sit for 20+ minutes with the wireless key fob out of range of the vehicle.
Chevrolet 1998-2005 DIESEL C/K2500 & C/K3500 (including Silverado and Suburban), G30, G3500 (including Sport Van, Express Cut-Away & Cargo), P30 Federal diesel vehicle over 8,500 GVWR is not OBD-II certified. Federal diesel vehicles over 8,500 GVWR were not built to comply with OBD-II or Fed OBD standards. Test normally.
BAR-OIS will ignore incomplete continuous monitors. If the vehicle fails to communicate, use the result of the bulb check for the overall result of the OBD Test if the analyzer offers this option.
Chevrolet 1999-2005 3500 W35042 (box truck) [GVWR 10,001 - 14,000] (diesel)
[Federal certified]
Vehicle is not equipped with OBD II. OBD not installed in federals during these years. OIS programmed to skip the OBD functional test.
Chevrolet 2000-2002 S-10 (2WD), 2.2L I-4 (E85) Monitors won’t set on certain flex fuel models, VINs listed below.

YGMXT02.2121
YGMXT02.2122
1GMXT02.2122
2GMXT02.2122
YGMXT02.2121
YGMXT02.2122 (VIN 8th digit: 5)
System monitors disabled for operation > E15 blends: O2 Sensor Heater, Secondary Air, Catalyst.

System monitors disabled for operation > E10 blends: Evaporative leak check.

Desensitized O2 Senor monitor implemented; only reports faults during operation < E15 blends.
OIS ignores all 11 readiness monitors.
Chevrolet 2000-2005 Suburban, Silverado, Express, Avalanche (gasoline)
[Federal certified]
Message appears during OIS OBD II test stating, “Unable to confirm this Vehicle’s OBD II requirements. Does this vehicle have OBD II?” Federally certified vehicle may not be certified to OBD II standards. Check under-hood emission label to determine OBD certification status. Enter correct result into OIS and follow OIS prompts. OIS may state a BAR-97 test is required on vehicles without OBDII.
Chevrolet 2001 Silverado / Tahoe C/K 1500 Failure to set secondary air system monitor. Possible air injection problem (check valve(s), vacuum line, pump, air passages). Diagnose;
Repair and retest.
Chevrolet 2002 Silverado C/K 2500HD (diesel) Failure to set EGR monitor. Difficult drive cycle. OIS reprogrammed 10/13/2016 to allow monitor to be incomplete.
Chevrolet 2001-2002 Cavalier CNG First VIN digit "3" (built in Mexico) Failure to set CAT monitor. Vehicle design anomaly. OIS reprogrammed 02/11/2015 to allow any one monitor to be incomplete
Chrysler 1999-2000 Town & Country with 3.0L engine built after 12/1/1998 EGR Monitor will not complete at high altitude. Reflash available. Confirm all systems functioning. Erase and reprogram PCM per TSB 18-03-00. Vehicle requires reflash Repair per TSB, run monitors then retest.
Chrysler 2000 Town and Country
3.3L V-6 (E-85)
Readiness monitors will not set on certain flex fuel models, VINs listed below.

WCRXT03.32BP (VIN 8th digit: G)
All monitors disabled for operation >E30 and ethanol fuel content learning. OIS ignores all 11 readiness monitors.
Chrysler 2003 PT Cruiser 2.4 liter DOHC 16v turbocharged (sales code EDV) with 5- spd manual G288 trans (sales code DDD) Failure to set catalyst monitor. PCM software error. Dealer must reprogram PCM. Emissions warranty extended to lifetime for this issue. Diagnose and repair per TSB #18-112-16. Possible repair payment reimbursement, see warranty D-16-26. Vehicle requires reflash. Repair per TSB and retest.
Chrysler 2010 built prior to 2/20/2010 300, Charger, Challenger 3.5L (5 speed automatic transmission) Fail for monitor readiness,
Or
MIL illumination: P0456, P0452, P1115.
Reflash available. See Chrysler TSB #18-008-10 Vehicle requires reflash. Repair per TSB and retest.
Dodge 1998-2002 Ram Truck 5.9L (Cummins diesel)
[California certified]
Some continuous monitors will not complete. Vehicle design anomaly. Test normally.
BAR-OIS allows one incomplete continuous monitor.
Dodge 1998-2006 Ram 2500, Ram 3500 (diesel)
[Federal certified]
Federal diesel vehicle over 8,500 GVWR is not OBD-II certified. Federal diesel vehicles over 8,500 GVWR were not built to comply with OBD-II or Fed OBD standards. Test normally.
BAR-OIS will ignore incomplete continuous monitors. If the vehicle fails to communicate, use the result of the bulb check for the overall result of the OBD Test if the analyzer offers this option.
Dodge 1999-2000 Caravan with 3.0L engine built after 12/1/1998 EGR Monitor will not complete at high altitude. Reflash available. Confirm all systems functioning. Erase and reprogram PCM per TSB 18-03-00. Vehicle requires reflash. Repair per TSB, run monitors then retest.
Dodge 2003 Dakota, Durango and Ram Trucks with 4.7L engine
[California or 50 State certified]
Catalyst monitor readiness status shows as not supported. Broken vehicle, repair per TSB #18-032-10 with lifetime warranty. Test normally.
OIS ignores unsupported monitors.
Dodge 2003 Ram Truck 5.9L (Cummins diesel)
[California certified]
MIL light is commanded on, but check engine light is not illuminated and no DTCs are stored. Vehicle design anomaly Recall campaign #K01 for ECM reflash applies to California certified vehicles only. Test normally.
OIS ignores MIL Command if no DTCs are present on this vehicle Advise motorist of Recall Campaign #K01 if the vehicle is California certified.
Dodge 2003-2004 25004X2 and Sprinter 35004X2 (diesel)
[2003 Federal certified]
[2004 Federal certified]
Federal diesel vehicle over 8,500 GVWR is not OBD-II certified. Federal diesel vehicles over 8,500 GVWR were not built to comply with OBD-II or Fed OBD standards. Test normally.
BAR-OIS will ignore incomplete continuous monitors. If the vehicle fails to communicate, use the result of the bulb check for the overall result of the OBD Test if the analyzer offers this option.
Dodge 2004-2005 built after 12/7/2003 Ram Truck 5.9L (Cummins diesel)
[California certified]
Comprehensive component monitor will not complete. Vehicle design anomaly Re-flash available per TSB #18-030-10 with lifetime warranty per TSB #18-003-11. Test normally.
OIS allows one incomplete readiness monitor. Advise motorist of fix with lifetime warranty per TSB #18-003-11.
Dodge 2004-2006 2500 3500 Sprinter (diesel) EGR/VVT monitor will not complete. ECU software error. Test normally.
OIS will ignore EGR/VVT monitor.
Dodge 2005 Ram Truck 5.9L (Cummins diesel)
[Federal certified]
Misfire and Comprehensive Components monitors will not complete. Vehicle design anomaly. Test normally.
OIS ignores misfire and comprehensive component monitor readiness.
Dodge 2006-2007 Ram Truck 5.9L, 6.7L (Cummins diesel)
[California certified]
Fuel System and Comprehensive Components monitors will not complete. Recall campaign #K01 for ECM reflash applies to California certified vehicles only. Test normally.
OIS ignores fuel and comprehensive component monitor readiness. Advise motorist of Recall Campaign #K01 if the vehicle is California certified.
Dodge 2006-2007 Ram Truck with 5.9L (ETC or ETH) built after 1/1/06,
[Federal Certified], Cab Chassis with 6.7L (ETJ) built before 1/11/07 (Cummins diesel)
[Federal certified]
Fuel System and Comprehensive Components monitors will not complete. TSB #18-017-10 for ECM reflash applies to Federal certified vehicles only. Test normally.
OIS ignores fuel and comprehensive component monitor readiness. Advise motorist of TSB #18-017-10 if the vehicle is Federal certified.
Dodge 2010 built before 2/20/10 300, Charger, Challenger 3.5L (5 speed automatic transmission) Evaporative monitor will not set. Evaporative leak detection monitor may not set to ready. Test normally.
Inform consumer of TSB #18-008-10 Revision A.
Ford 1998-2003 Truck 7.3L (diesel) Engine could shut off when requesting Mode $09 data with aftermarket scan tool. Vehicle design anomaly. Test normally.
OIS programmed to skip Mode $09 data request on these vehicles.
Ford 1998-2004 F250, F350, E350, E450, E Super Duty, Econo Commercial S- Duty, Econo RV S- Duty (diesel)
[Federal certified]
Federal diesel vehicle over 8,500 GVWR is not OBD-II certified. Federal diesel vehicles over 8,500 GVWR were not built to comply with OBD-II or Fed OBD standards. Test normally.
BAR-OIS will ignore incomplete continuous monitors. If the vehicle fails to communicate, use the result of the bulb check for the overall result of the OBD Test if the analyzer offers this option.
Ford 2000-2004 F250, F350, E350, Excursion (gasoline)
[Federal certified]
Message appears during OBD II test stating, “Unable to confirm this Vehicle’s OBD II requirements. Does this vehicle have OBD II?” Federally certified vehicle may not be certified to OBD II standards. Check under-hood emission label to determine OBD certification status. Enter correct type into OIS and follow OIS prompts. OIS may state a BAR-97 test is required on vehicles without OBDII.
Ford 2003 Focus Fail for readiness. Monitors may be difficult to complete. Broken Vehicle. Reflash PCM per TSB #06-7-5. Then test normally.
Ford 2004 E350 Super duty 5.4 (gas) Failure to set CAT monitor. Vehicle design anomaly Recall #15E06 dated 1/13/2016 may apply. Reflash ECM so CAT monitor will set. Vehicle requires reflash. Repair per recall and retest.
Ford 2011 Edge, Explorer 3.5L & 3.7L Vehicle fails for readiness. Some vehicles do not set readiness monitors. Some vehicles clear the OBD-II diagnostic data on every engine start and/or incorrectly report the VIN. Reprogram or update vehicle’s calibration. Perform monitor drive cycle. Please consult Ford Emission Recall #13E04 for applicability.
Owner must ensure recall is performed if required and all monitor drive cycles are completed prior to Smog Check testing.
Ford 2021 E/F 350 Cutaway & E/F 450 Stripped Chassis; 7.3L; Gasoline (most are ambulances) Will not communicate with BAR-OIS. Possible vehicle design or conversion anomaly. Investigating cause. Test normally. BAR-OIS will bypass the OBD Test and go straight to the smoke check.
Freightliner 1998-2004 M Line Walk In Van [GVWR 6,001-14,000] (diesel)
[Federal certified]
Vehicle is not equipped with OBD II. OBD not required in federally certified vehicles in this GVWR range during these years. OIS programmed to skip the OBD functional test.
Freightliner 2004-2006 Sprinter (diesel) EGR/VVT monitor will not complete. ECU software error. Test normally. OIS will ignore EGR/VVT monitor.
GM 2000 - 2008 Various models, and Silverado 1500 OIS prompts for no vehicle voltage. No power on vehicle’s OBDII connector (DLC pin 16). Possible blown fuse. Use auxiliary DAD cables / power supply per DAD manufacturer's instructions.
GM 2015-2017 All gasoline powered Fail for readiness. Post catalyst oxygen sensor monitor will not run until after 1,000 mile catalyst break in. See Bulletin #15-NA-010. Inspect vehicle after 1,000 miles or send to Referee.
GMC 1998-2005 DIESEL C/K2500 & C/K 3500 (including Suburban and Sierra), Savana G3500, Workhorse P30 Forward Cntl Federal diesel vehicle over 8,500 GVWR is not OBD-II certified. Federal diesel vehicles over 8,500 GVWR were not built to comply with OBD-II or Fed OBD standards. Test normally. BAR-OIS will ignore incomplete continuous monitors. If the vehicle fails to communicate, use the result of the bulb check for the overall result of the OBD Test if the analyzer offers this option.
GMC 1999-2005 W3500 W35042 (box truck) [GVWR 10,001 - 14,000] (diesel)
[Federal certified]
Vehicle is not equipped with OBD II. OBD not required in federally certified vehicles in this GVWR range during these years. OIS programmed to skip the OBD functional test.
GMC 2000-2002 Sonoma (2WD), 2.2L I-4 (E85) Monitors won’t set on certain flex fuel models, VINs listed below.

YGMXT02.2121
YGMXT02.2122
1GMXT02.2122
2GMXT02.2122
YGMXT02.2121
YGMXT02.2122 (VIN 8th digit: 5)
System monitors disabled for operation > E15 blends: O2 Sensor Heater, Secondary Air, Catalyst.

System monitors disabled for operation > E10 blends: Evaporative leak check.

Desensitized O2 Senor monitor implemented; only reports faults during operation < E15 blends.
All 11 readiness monitors ignored in OIS.
GMC 2000-2005 Sierra, Yukon, Savana (gasoline)
[Federal certified]
Message appears during OIS OBD II test stating, “Unable to confirm this Vehicle’s OBD II requirements. Does this vehicle have OBD II?” Federally certified vehicle may not be certified to OBD II standards. Check under-hood emission label to determine OBD certification status. Enter correct type into OIS and follow OIS prompts. OIS may state a BAR-97 test is required on vehicles without OBDII.
GMC 2002 Sierra C/K 2500HD (diesel) Failure to set EGR monitor. Difficult drive cycle. OIS reprogrammed 10/13/2016 to allow monitor to be incomplete.
Hyundai 2002 Sonata Fail for readiness. Monitors are difficult to complete; perform drive cycle two times. Run drive cycle. See TSB #02-36-030.
Hyundai 2003 Tiburon Will not communicate with generic OBD test equipment. Pin 5 not grounded.

Ground pin 5 by jumping to pin 4 in DLC per TSB.
Test normally on OIS.

If using generic OBD test equipment, perform recall campaign #057 and Hyundai TSB #03-01-003-01.
Infiniti 2000 -2001 I30 Failure to set catalyst monitor. Only OEM scan tool shows OBD catalyst code. Test catalyst and replace if defective.
Infiniti 2000 -2001 I30 Fail for readiness. Vehicle has difficulty completing all monitors during normal driving. Run drive cycle.
Isuzu 1998-2005 NPR [GVWR 10,001- - 14,000] (diesel)
[Federal certified]
Vehicle is not equipped with OBD II. OBD not required in federally certified vehicles in this GVWR range during these years. OIS programmed to skip the OBD functional test.
Isuzu 2000-2002 Hombre (2WD) 2.2L I-4 (E85) Monitors wont set on certain flex fuel models, VINs listed below.

YGMXT02.2121
YGMXT02.2122
1GMXT02.2122
2GMXT02.2122
YGMXT02.2121
YGMXT02.2122 (VIN 8th digit: 5)
System monitors disabled for operation > E15 blends: O2 Sensor Heater, Secondary Air, Catalyst.

System monitors disabled for operation > E10 blends: Evaporative leak check.

Desensitized O2 Sensor monitor implemented; only reports faults during operation < E15 blends.
OIS ignores all 11 readiness monitors.
Jeep 2005-2006 Wrangler O2 sensor, O2 heater, and catalyst readiness monitors may indicate not ready. Vehicle design anomaly. TSB #25-005-13 Rev. A contains wiring modification to make vehicle ready. OIS allows incomplete O2 heater monitor.
Jeep 2010-2011 Wrangler 3.8L Failure to set Oxygen sensor monitor. PCM not running monitor frequently enough. Recall L34 (m/t) through 9/10/2010. Recall L35 (a/t) through 3/26/2011, and/or OEM drive cycle not working. Reflash PCM per TSB 18-027-10.
May need to run special drive cycle to set O2 monitor. [Coast from 70 to 30mph three times then pullover and restart engine.]
Kia 2009 Borrego LX/EX 3.8L Fail for readiness. Vehicle may not set EGR monitor. Vehicle has difficulty completing EGR monitor. Difficult to run drive cycle. OIS reprogrammed 12/7/2017 to allow EGR/VVT monitor to be incomplete.
Lexus 2007 RX400 Hybrid Fail for oxygen sensor (air/fuel) monitor readiness. Air conditioning readiness monitor mistakenly set to supported instead of unsupported. Air Fuel monitor issue. Perform software update to vehicle at no charge per Lexus campaign FLD with TSB #L-SB-0027-15. If fails for incomplete oxygen sensor monitor, advise motorist recall may be required. Recall status: use http://www.toyota.com/recall.
Lincoln 2011 MKX 3.5L & 3.7L Vehicle fails for readiness. Some vehicles do not set readiness monitors. Some vehicles clear the OBD-II diagnostic data on every engine start and/or incorrectly report the VIN. Reprogram or update vehicle’s calibration. Perform monitor drive cycle. Please consult Ford Emission Recall #13E04 for applicability.
Owner must ensure recall is performed if required and all monitor drive cycles are completed prior to Smog Check testing.
Mazda 2000 MPV Failure to set Catalyst monitor. May need catalyst and/or oxygen sensor. Diagnose and repair. Likely broken vehicle;
Repair and Retest.
Mazda 2002-2003 B3000 (2WD) 3.0L V-6 (E-85) Readiness monitors will not set on certain flex fuel models. Monitors disabled for operation >E10 blends: Catalyst.

Desensitized evaporative leak/purge check monitor to detect gross leak for operation >E75 blends (monitor fully compliant up to E75 blends).
OIS ignores all 11 readiness monitors.
Mazda 2003-2004 Mazda 6 Some vehicles may have a false MIL illumination during inspection with multiple U-code DTCs during OBDII test. The following OBD Codes may be set. (U1900-ABS, U2516-ABS, U1900-FF- IC, U2516-FF-IC, U0073-FF- PCM, U0073-FF-TCM, U0100-FF-TCM). PCM sensitive to OBD tool connect or disconnect to DLC with ignition in the "On" position, or when the engine is running.

See Mazda Service Bulletin #01-002/05 Dated 01/13/2005. Erase trouble codes, disconnect tool when ignition switch off. Reset monitors.
Follow OIS prompts - connect/disconnect DAD to vehicle only when key off.
Mazda 2005 Mazda 6 (with 2.3 only) Some vehicles may have a false MIL illumination during inspection with multiple U-code DTCs during OBDII test. The following OBD Codes may be set. (U1900-ABS, U2516-ABS, U1900-FF- IC, U2516-FF-IC, U0073-FF- PCM, U0073-FF-TCM, U0100-FF-TCM). PCM sensitive to OBD tool connect or disconnect to DLC with ignition in the "On" position, or when the engine is running.

See Mazda Service Bulletin #01-002/05 Dated 01/13/2005. Erase trouble codes, disconnect tool when ignition switch off. Reset monitors.
Follow OIS prompts - connect/disconnect DAD to vehicle only when key off.
Mazda 2003-2005 Mazda 6 - 2.3 engine non PZEV (built May 20, 2002 - July 2, 2005) Mazda 6 - 3.0 engine (built May 16, 2002 - August 23, 2004) Some vehicles may have a false MIL illumination during inspection. This will cause the vehicle to fail the test, although the vehicle itself has no problem. PCM sensitive to OBD tool connect or disconnect to DLC with ignition in the "On" position, or when the engine is running.

See TSB #01-024/05. If vehicle within VIN range reprogram PCM and TCM. Or Earlier Emission Recall TSB #1303F to Reprogram PCM applicable to certain VINs.
Follow OIS prompts - connect/disconnect DAD when key off.
Mitsubishi Fuso 1998-2004 FE639/FG639 [GVWR 10,001 –14,000] (diesel)
[Federal certified]
Vehicle is not equipped with OBDII. OBD not required in federally certified vehicles in this GVWR range during these years. OIS programmed to skip the OBD functional test.
Mitsubishi 2000-2001 Montero, Montero Sport, Diamante, 3000GT Mirage, Galant, Expo/Expo LRV, and Eclipse models (except 2.0L non—turbo 420A engine models). Fail for monitor readiness. Some monitors are difficult to complete. Follow recommended drive cycles.
See Mitsubishi service manual.
Nissan 1999-2007 UD1200, [GVWR 10,001-14,000] (Diesel)
[Federal certified]
Vehicle is not equipped with OBDII. OBD not required in federally certified vehicles in this GVWR range during these years. OIS programmed 2/26/2016 to skip the OBD functional test.
Nissan 2000-2001 Maxima Failure to set catalyst monitor. Only OEM scan tool shows OBD catalyst code. Test catalyst and replace if defective.
Nissan 2000-2006 All models Fail for monitor readiness. Incomplete monitors during normal driving.

Follow drive cycle for that specific year, make, model, engine, certification, transmission. Run entire drive pattern even if only one monitor unset.
Follow drive cycle. See owner’s manual.
Plymouth 1999-2000 Voyager with 3.0L engine built after 12/1/1998 EGR Monitor will not complete at high altitude. Reflash available. Confirm all systems functioning. Erase and reprogram PCM per TSB 18-03-00. Vehicle requires reflash.

Repair per TSB, run monitors then retest.
Plymouth 2000 Voyager 3.3L V-6 (E-85) Readiness monitors will not set on certain flex fuel models, VINs listed below. WCRXT03.32BP (VIN 8th digit: G). All monitors disabled for operation >E30 and ethanol fuel content learning. OIS ignores all 11 readiness monitors.
Suzuki 2001 Aerio Fail for monitor readiness. Monitors can be difficult to complete. Follow drive cycle. See OBD Clearinghouse or Suzuki service information.
Suzuki 2004 Forenza Fail for monitor readiness. Monitors can be difficult to complete. Follow drive cycle. See OBD Clearinghouse or Suzuki service information.
Toyota 2000-2006 All models Fail for monitor readiness. Monitors can be difficult to complete. Follow drive cycle. See Toyota service information.
Toyota 2003-2004 4 Runner Vehicle Stability Control (VSC) light may illuminate if CAN protocol attempted with aftermarket scan tool. Vehicle loses stability control calibration when CAN protocol attempted. Follow service procedure to reset zero-point calibration. OIS will not attempt to communicate via CAN protocol on these vehicles.
Toyota 2007 Highlander Hybrid Fail for oxygen sensor (air/fuel) monitor readiness. Air Fuel monitor issue.

Perform software update to vehicle at no charge per Toyota Special Service Campaign F0P, dated August 20, 2015 and TSB #0042-15.
If fails for incomplete oxygen sensor monitor, advise motorist recall may be required. Recall status: use http://www.toyota.com/recall.
Volvo 2000 S40 / V40 Failure to set Comprehensive, Oxygen sensor, and Catalyst monitors. Defective ECM. Send to Referee for inspection only if comprehensive, oxygen sensor, and catalyst monitors unset. If any additional failures exist, they must be repaired before the Referee inspection.
Volvo 2004-2006 S40, V50 Air conditioning readiness monitor mistakenly set to supported instead of unsupported. Vehicle design anomaly. OIS ignores A/C monitor status.
Volvo 2005-2007 XC90 Air conditioning readiness monitor mistakenly set to supported instead of unsupported. Vehicle design anomaly. OIS ignores A/C monitor status.
VW 2000-2005 Passat May fail for no OBD communication.
No response or Only Transmission Control Module responds to DADs requests.
ABS and/or brake lamp illuminated in instrument panel cluster
Broken ground bond wire in ABS module causes diagnostic communication issues with the ABS module, ECM, and TCM. Diagnose and repair per VW TSB #45 15 01, dated September 21, 2015. Likely Broken Vehicle Repair and Retest.

BAR-97 EIS Vehicles of Interest (OBD)

Table 5 below includes 1996-1999 model-year vehicles that have a monitor readiness issue with the OBD test portion of a BAR-97 EIS inspection. In most cases, the BAR-97 EIS is programmed to accommodate vehicles with a design anomaly.

Table 5: BAR-97 EIS Vehicles of Interest (OBD)

Make Year Model
Engine (L); Fuel Type
Issue Cause and Possible Remedy Instructions to Inspector
BMW 1996 7-Series, 8-Series 5.0L, 5.4L Monitors difficult to complete. EIS ignores readiness status.
Chrysler 1996 Cirrus, Concord, LHS Sebring Convertible All monitors reset to incomplete upon every ignition key-off. Recall campaign #678 applies to California certified vehicles originally sold in California.

TSB #18-005-01 (with lifetime warranty) applies to federal certified and California certified originally sold in northeast states.
Comply with recall, then test as normal.
Chrysler 1996 Concord, LHS, New Yorker, Sebring, Town & Country 2.0L, 2.4L, 2.5L, 3.3L, 3.5L Monitors difficult to complete. EIS ignores readiness status.
Chrysler 1998-1999 Town & Country 3.3L Flex Fuel Monitors may not function when ethanol is detected by the vehicle. Test as normal.
Dodge 1996 Stratus, Intrepid, Neon All monitors reset to incomplete upon every ignition key-off. Recall campaign #678 applies to California certified vehicles originally sold in California.

TSB #18-005-01 (with lifetime warranty) applies to federal certified and California certified originally sold in northeast states.
Comply with recall, then test as normal.
Dodge 1996 Avenger, Stratus 2.0L manual Monitors difficult to complete. EIS ignores readiness status.
Dodge 1996 Stealth 3.0L All monitors reset to incomplete upon every ignition key-off. These vehicles are not reflashable. EIS ignores readiness status.
Dodge 1998-1999 Caravan 3.3L Flex Fuel Monitors may not function when ethanol is detected by the vehicle. Test as normal.
Eagle 1996 Vision All monitors reset to incomplete upon every ignition key-off. Recall campaign #678 applies to California certified vehicles originally sold in California.

TSB #18-005-01 (with lifetime warranty) applies to federal certified and California certified originally sold in northeast states.
Comply with TSB, then test as normal.
Eagle 1996-1997 Talon 2.0L Monitors difficult to complete. EIS ignores readiness status.
Hyundai 1996 Accent 1.5L Elantra 1.8L Sonata 2.0L Monitors difficult to complete. EIS ignores readiness status.
Hyundai 1997-1998 Sonata 2.0L, 3.0L Monitors difficult to complete. EIS ignores readiness status.
lnfiniti 1996 All models Catalyst and evaporative system monitors are difficult to complete. Follow drive cycle for specific vehicle model per TSB #ITB98-011F, June 7, 2013. Test as normal.
Kia 1996 Sephia Sportage Monitors difficult to complete. EIS ignores readiness status.
Lexus 1996-1999 All models Monitors can be difficult to complete. Follow drive cycles in Lexus service information. Test as normal.
Mercedes-Benz 1996 C220, E320, C280, S320, SL320 The MIL illuminates when a scan tool is connected to the DLC. Trouble codes are not stored. If the OBD II connector is used as the RPM source during the Smog Check, the MIL will illuminate. Do not connect the OBD II connector until the analyzer prompts for the OBD II functional test. Use the conventional contact or non-contact method to obtain an rpm signal.
Mitsubishi 1996-1997 All Models Monitors difficult to complete. EIS ignores readiness status.
Mitsubishi 1998 Eclipse (all), Galant 2.4L, Mirage, Montero Sport 2.4L Monitors difficult to complete. EIS ignores readiness status.
Mitsubishi 1998 3000GT, Diamante, Galant 2.3L, Montero, Montero Sport 3.0L Some monitors are difficult to complete. Follow recommended drive cycles in Mitsubishi service manual. Test as normal.
Mitsubishi 1999 All models Some monitors are difficult to complete. Follow recommended drive cycles in Mitsubishi service manual. Test as normal.
Nissan 1996 Sentra 1.6L and 2.0L manual, 200SX 1.6L, 240SX 2.4L, Maxima 3.0L, Pickup 2.4L Monitors difficult to complete. EIS ignores readiness status.
Nissan 1996-1997 All models Catalyst and evaporative system monitors are difficult to complete. Follow recommended drive cycle for specific model per Nissan TSB #NTB98-018G, June 7, 2013. Comply with TSB, then test as normal.
Nissan 1999 All models Monitors can be difficult to complete. Follow owner's manual drive cycle to achieve readiness. Test as normal.
Plymouth 1996 Breeze, Neon All monitors reset to incomplete upon every ignition key-off. Recall campaign #678 applies to California certified vehicles originally sold in California.
TSB #18-005-01 (with lifetime warranty) applies to federal certified and California certified originally sold in northeast states.
Comply with recall, then test as normal.
Plymouth 1998-1999 Voyager 3.3L Flex Fuel Monitors may not function when ethanol is detected by the vehicle. Test as normal.
Saab 1996-1998 900 2.3L (B234 with Motronic 4.1) Monitors difficult to complete. EIS ignores readiness status.
Saab 1996-1998 All models Catalyst and evaporative system monitors are difficult to complete. Saab Service Instruction No. 248-9037 describes the correct drive cycle for completion of the monitors. Comply with TSB, then test as normal.
Subaru 1996 All models Readiness cleared at key-off. EIS ignores readiness status.
Toyota 1996-1999 All models Monitors can be difficult to complete. Follow drive cycles in Toyota service information. Test as normal.
Toyota 1996-1997 Tercel, Paseo Evaporative system monitor will never complete or is unsupported. The EIS allows any one monitor to be incomplete. Test as normal.
VW 1997-1999 Passat May fail for no OBD communication.

No response or Only Transmission Control Module responds to DADs requests.

ABS and/or brake lamp illuminated in instrument panel cluster.
Broken ground bond wire in ABS module causes diagnostic communication issues with the ABS module, ECM, and TCM.

Diagnose and repair per VW TSB #45 15 01, dated September 21, 2015.
Likely Broken Vehicle. Repair and retest.
Volvo 1996-1998 All models Monitors difficult to complete. Follow recommended drive cycles in Service Bulletin 25-19 EIS ignores readiness status.

Permanent Diagnostic Trouble Code (PDTC) Vehicles of Concern

Table 6: Permanent Diagnostic Trouble Code (PDTC) Vehicles of Concern

Make Year Model
Engine (L); Fuel Type
Issue Cause and Possible Remedy Instructions to Inspector
Audi 2010 Q7 3.0L (TDI/diesel) Permanent Fault Codes P0087, P0088, and P053F will not clear if present. No remedy is available. Test normally. BAR-OIS ignores these codes.
Audi 2011-2012 Q7 3.0L (TDI/diesel) Permanent Fault Codes P0087, P0088, P053F, P064A, P2635, and P0230 will not clear if present. No remedy is available. Test normally. BAR-OIS ignores these codes.
Chrysler 2017-2019 Pacifica Hybrid Vehicle fails for PDTC C2200 or B22A9. Vehicle not self-clearing permanent fault code. Test normally. BAR-OIS will ignore these codes.
Dodge 2012-2015 Challenger, Charger, Dart, Durango (gasoline) Vehicle fails for Permanent Fault Code U0140. Vehicle not self-clearing permanent fault code. Test normally. BAR-OIS will ignore this code.
Ford 2011-2014 Mustang 3.7 L & 5.0 L (gasoline) Vehicle fails for Permanent Fault Code P0315. Vehicle not self-clearing permanent fault code. Refer the motorist to Ford for Customer Satisfaction Program 17N01.
Freightliner 2014-2015 Sprinter 2500 Sprinter 3500 (diesel) Vehicle fails for Permanent Fault Codes P202A, P203A, P208A, P20B9, P20BD, P20BE or P20FA. Vehicle not self-clearing permanent fault code. Test normally. BAR-OIS will ignore these codes.
Jeep 2014 Grand Cherokee (gasoline) Vehicle fails for Permanent Fault Code U0140. Vehicle not self-clearing permanent fault code. Test normally. BAR-OIS will ignore this code.
Jeep 2014-2017 Grand Cherokee (diesel) Vehicle fails for Permanent Fault Code P1D30. Vehicle not self-clearing permanent fault code. Test normally. BAR-OIS will ignore this code.
Mercedes 2010-2013 350 Bluetec Vehicle fails for Permanent Fault Codes P203D, P20B6, P20BD or P20BE Vehicle not self-clearing permanent fault code. Test normally. BAR-OIS will ignore these codes.
Mercedes 2014-2015 Sprinter 2500 Sprinter 3500 (diesel) Vehicle fails for Permanent Fault Codes P202A, P203A, P208A, P20B9, P20BD, P20BE or P20FA. Vehicle not self-clearing permanent fault code. Test normally. BAR-OIS will ignore these codes.
Ram 2013-2014 Ram 1500 (gasoline) Vehicle fails for Permanent Fault Code U0140. Vehicle not self-clearing permanent fault code. Test normally. BAR-OIS will ignore this code.
Ram 2014-2017 Ram 1500 (diesel) Vehicle fails for Permanent Fault Code P1D30. Vehicle not self-clearing permanent fault code. Test normally. BAR-OIS will ignore this code.
Volkswagen 2010 Touareg 3.0L (TDI/diesel) Permanent Fault Codes P20B5, P0087, P0088, and P053F will not clear if present. No remedy is available. Test normally. BAR-OIS ignores these codes.
Volkswagen 2011-2012 Touareg 3.0L (TDI/diesel). Permanent Fault Codes P20B5, P0087, P0088, P053F, P064A, P2635, and P0230 will not clear if present. No remedy is available. Test normally. BAR-OIS ignores these codes.