Smog Check Manual and Reference Guides

  • 2017 Smog Check Manual
  • Smog Check OBD Reference Guide - provides a summary of pass/fail standards for the On-Board Diagnostic (OBD) test portion of a Smog Check inspection and instructions for inspecting and repairing vehicles with known OBD test difficulties.
  • Smog Check Reference Guide - contains information pertaining to the operation of a Smog Check station, such as licensing requirements, repair cost waiver, and equipment maintenance. The Appendices in the Guide also provide advisement related to aftermarket emission parts, alternative fueled vehicles, and engine changes.