Questions & Answers for: Chevrolet p0420 code

P0420 & P0430 codes 99 silverado i have a 99 silverado1500 4.8L and im getting codes P0420 and P0430? i was told it was my o2 that needed to be replaced, but theres 4 of um 2 (pre&post)on each

...p0420 catylist efficiency below threshold ( p0420 ). heres a probable fix. go to http://repairpal.com/obd-code-p0420----- this will tell what may be wrong as not to replace parts that are not

code p0332 and p0420 2000 chevy monte carlo check engine is on and i plug in a scanner and it give me this 2 codes p0332 and p0420 16716/P0332 - Knock Sensor 2 (G66): Signal Too Low Possible Symptoms ...

...code p0420. Engine seems to be running smoothly. http://www.obd-codes.com/p0420 TSB Number: 3316NHTSA Number: 10017210TSB Date: n/aDate Added to File: October 27, 2005 Failing Component:Electrical ...

...P0420 code is a trouble code on OBD-II equipped vehicles. All vehicles from 1996-newer sold in North America support this generic powertrain code. This code is a pretty common one and this site is ...

...if the engine is getting fuel and ignition first then go from there. P0420 mean Catalyst System Efficiency Below Threshold.If you want to know more ,please view Diagnostic Trouble Code Table

You have a P0420 code on my Chevy Cavalier A P0420 code is for the catalytic converter

...code p0420 what is code p0420 i change the oxigen censor the upper one and the lower one.. i chenge the fuel filter and the air filter.. still getting code p0420 Is your engine temperature at 210 ...

...P0420 code means that the vehicle's control module has detected that the three-way catalytic converter is not working properly (is not as efficient as the factory is expecting). Replacing the oxygen ...

...code P0420. How can I fix this? Do you know what a catalytic converter is ? P0420 How To Diagnose Bad Catalytic Converter EricTheCarGuy Your best bet , take your vehicle to a qualified repair shop ...