2002 Pontiac Sunfire "tell cat bad car" Questions

...bad heater in O2 sensor. Idles really rough when first started up in the morning. Exhaust smells really gassy. After engine warms up runs great for the rest of the day. Is there 1 or 2 O2 sensors on ...

...tell you. it bad. using codes. if sensor really is bad replace it, if wires to it bad, fix those.. the CAT if not clogged leave it be, if must pass smog its still last. next time post engine, can fix ...

...a cat con should last the life of the car. For a cat con to go bad there must be excessive heat in the system to melt the material in the cat con. For two cat con to failure there's something

Cat. all this is the domain of the ASE mech. he knows all stuff. and never ever lets the ECU tell him what to do.; it does tell him (suggests) a battery of test. sure. hope that helps, post all stored

tell me the problem PO420 code tells you the catalytic converter is not reaching the proper temperature .. that is measured by the back oxygen sensor (just behind the CAT ... make sure the heat shield

...tell if the 02 sensor is bad or if it’s the catilitic converter gone bad ? It would take someone with a scan tool and some experience to watch O2's to see if the CAT is functioning properly. If you ...

TELL THE DIFFEENCE BETWEEN A BAD INJECTOR AND A PLUGGED CAT A bad injector would give the engine a cylinder misfire. You would have a check engine light with a P0300-P0306 code stored in the computer.

...cat one. dont let those shop guys bully ya into spending to much tell me what they say cause there always after an unsuspecting person's wallet, thats why i opened my own shop. if this helped throw ...

...cat converter gone bad and since it is an 08 cat should be covered under warranty check with a dealer most converters are covered for five years doesnt matter how many miles on vehicle This code is ...

...cat is good. checked all pcm grounds and 5 vole referances all good. any ideas? p0300 tells you the engine is missing .. the p0108 is the MAP sensor circuit .. MAP is "Manifold Absolute Pressure" or ...