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Failed Smog Test

1999 Acura TL Check Engine Light ON

There doesn't seem to be any drivability problems with my Acura TL although the check engine light is on. Is it possible that it is not related to a smog emissions problem? If so, do I still need to have it fixed to get a PASS even though all emission measurements are OK? Basically can my Acura TL pass the smog check with the check engine light ON?


Vehicle manufacturers have programmed the check engine light to illuminate only when there is a vehicle problem which might increase emissions. With that said, anytime the check engine light is on a vehicle will fail the smog test. You will need to have your 1999 Acura TL diagnosed by a certified smog check repair center, have the trouble codes retrieved, the faults corrected, and then obtain a smog test.

Although your Acura TL might not display symptoms of engine or drivetrain trouble, its computer system may be operating under preset (pre-programmed) settings in order to maintain as low emissions and high engine efficiency as possible. The fault(s) will need to be repaired for the computer to return to using real-time engine data in order to calculate best air/fuel ratio.

posted by SmogTips Support 12-01-2014 09:20 AM

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