Questions & Answers for: Chevrolet p0420

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

chevy caviler 1999 with P0420 whats the problem,what is P0420? This refers to your catalytic converter located on the exhaust system. This can possibly be a problem with one of the oxygen sensors used

error coce P0420 on OB-2 scanner error coce P0420 on OBD-2 scanner P0420 = Catalyst System Efficiency Below ThresholdCatalyst System Efficiency Below Threshold. This means that the secondary O2 sensor

p0420 2001 Chevy 1500 2wd 4.3liter Go to this site it is how to fix the P0420. http://www.aa1car.com/library/p0420_dtc.htm

fault codes p0420&p1406 fault codes 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 ...

i have 2 falt numbers po715 and po420 P0420 - Catalyst System Efficiency Below Threshold (Bank 1) P0715 - Input/Turbine Speed Sensor Circuit Malfunction dear SIr, P0715 is fault code for Turbine speed

P0420.... http://www.obd-codes.com/p0420

...miles) check engine light comes on and stays on. I am getting the check engine light code p0420. Engine seems to be running smoothly. http://www.obd-codes.com/p0420 TSB Number: 3316NHTSA ...

2003 chevy trailblazer 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 ...

I have a 2005 Chevy Equinox LS that shows the problem light code P0420. How can I fix this? Do you know what a catalytic converter is ? P0420 How To Diagnose Bad Catalytic Converter EricTheCarGuy Your