Questions & Answers for: p0420 cadillac deville

...cadillac deville service engine soon code p0420 on all the time changed egr valve today have not driven yet autozone told me it could be bad cat converters P0420 is catalytic converter inefficiency, ...

code p0420 what is fix What car do you have? That code generically means your catalytic converter is below efficiency. It could be the cat or (if your car is a 96 or newer), a secondary O2 sensor. The

What to do about A 2001 Cadillac deville Code P0420, Catalyst Efficiency below threshold?? Hello, If you have a code P0420 the only way to correct it is to replace the catalytic converter. Sorry.

What does code po420 P0420 Error Code: Catalyst System Efficiency Below Threshold (Bank 1)\ This means that your bank 1 catalytic converter is not doing its job, or the O2 sensor system monitoring it ...

...Cadillac Deville, 110,000 miles, Check Engine Light comes on and Code P0420 is displayed. This happens after the gas tank is filled and the vehicle is driven about 60 to 80 miles.The Check Engine ...

code p0420 catalytic converter code

cadillac deville, thats runs excellent. But the check enginge light came on, so i took it to advance to do the test, and the code was p0420. im guessing its a new Cat?? in the morning when i start the

IF IT SAYS PCM P0420 HISTORY WHAT DOSE IT MEAN IF IT SAY HISTORY AFTER CODE The problem occurred in the past and may not be happening now. Code 420 is for a problem where the catalytic converter is ...

...Cadillac deville with the code of p0420. . NO it will not . code po420 refers to cat converter system , bank 1--efficiency below threshold===causes cat converter---wiring--HO2S 2 Have the cat ...

...Cadillac deville p0420 code, stalling I have an 01 Cadillac deville, check engine light is on and throwing p0420 code. It will turn over but won't stay running without my foot on the peddle, ...