96 Geo Prizm Check Engine Light

So I'm new to this... do I need to have a dealer check it out, or is there a way I can run some tests, find out what is causing the light to be on and fix the problem. I'm told it won't pass NY inspection with it on. Thanks, John

try messing with the O2 sensor in the exhaust manifold

try messing with the O2 sensor in the exhaust manifold


Thanks Chadi... I'll give it a shot!