1993 Mazda 323 smog test not passed

1993 MAZDA 323
157,000 MILES • 4 CYL • 2WD • MANUAL
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MAUN
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My car did not pass the smog test in California. It has a 2 year old catalytic converter and Oxygen sensor. My local garage suspects the air flow sensor to be misfunctioning. How would I know that true? What's the cheapest way to fix it?
Apr 10, 2009 at 10:54 AM
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ATKAPARKING
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You must have a scope to view what the sensor is sending to the computer to verify the sensor--and even then, you could have a wiring problem. This makes car repair difficult--there is no magic tool that will show you what to fix. Most times, you can't be sure until you actually replace the component. I have been able to fix one of these through bending a tang inside, but I doubt the shop will want to take on that liability. You are probably looking at a new one--it would be nice if the shop could test with known good used. Good luck
Apr 30, 2009 at 2:42 PM