...had a problem. Here is some more information, hope this helps. When diagnosing a PCM code or codes: P0420, P0430, be sure to determine the cause of the converter failure. These converters are not ...
fault codes p0420 and p1404 on 1998 pontiac grand prix - solution the po420 is catalyst system efficiency below threshold (bank 1) the p1404 is a mfg specific code. egr valve stuck open or circuit ...
check engine code 0420 catalyst below threshold (bank 1) p0420- There are a number of things that could be causing this p0420 catalyst efficiency code. The most common thing is the catalytic converter
my 2005 pontiac grand prix has a bad misfire and uses alot of fuel i have two codes P0300 and P0420 can a bad map sensor throw these codes you have a cracked vaccum hose going to your fuel regulator ...
check engine light on got a diognostic and code P0128, P0420, and P0455 popped up trying to figure out what these codes mean and what I need to fix on my car P0128 ECT Sensor Below Thermostat ...
I have p0420 on my 06 pont gp gt. it mostly comes on after I slow down after highway Here is the trouble tree for that code it is most likely a bad cat but follow the trouble tree to see where it lead
...or rough vibration like the whole car is shaking and i took it and got a diagnostic and the code is p0420 please go to this site, it will explain this code. ...
...Note: Typically a failed catalytic converter does not cause this code. You're more likely to see a P0420 code for a failed ...
2001pontiac grand prix gt codes p0440 and p0420 The p0440 code is a loose gas cap code the p0420 code is a catalytic converter problem code.
obd2 code p0420 ok have you 02 sensor replace and your catalytic converter
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