Awasome Will My Car Fail Smog Test If Check Engine Light References. Possibly a short or open electrical condition, poor electrical connection at the bulb/cluster/pcm, and the more serious fault of a faulty ecc. Functional inspection the final part of the entire smog test process is the functional inspection.

Web the following vehicles are exempt from smog testing: Web if your engine’s oil is contaminated because of inadequate oil changes, it could cause higher emissions and a failed smog test. If you take your car in for a test with the check engine light on, you will fail.





