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My OBD System Check Failed On My Smog Test

How do I fix this to pass smog or what needs to be done.

Vehicle: 1992 TOYOTA CAMRY 22
asked Sep 13, 2013 by Wil

1 Answer

start by replacing the spark plugs and wires/cap and rotor if you have not done so, check for intake leaks, and pcv hoses. try to clean the mass air flow sensor with mass air flow sensor cleaner.

fill up with 91 octane gas from shell or chevron and use a good fuel system cleaner additive

 

Possible causes
- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection
read this
answered Sep 13, 2013 by G37driver (3,517 points)
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