Questions & Answers for: p0421

P0421 code on recently purchased(from dealer) 2002 RS Have a 2002 Eclipse RS which I just bought from a dealer...The "service engine soon" light came on...OBDII code P0421, and a P0421 pending. ...

how to fix daignostic codes p0304, p0421 and p0455 efficiently without costing an arm and a leg. P0304 is Misfire in cyl# 4. Check your ignition system and fuel system. P0421 is Catilist effeciency. ...

I am getting a P0031, P1512, & P0421 code I am getting a P0031, P1512, & P0421 code on my 2001 Mazda MPV mini van. P0031 - most likely pointing to a failed O2 sensor (bank 1 sensor 1 is ...

...Catalyst system bank 1 taken from: http://forums.evolutionm.net/lancer-troubleshooting/349095-code-p0421-call-mitsu-before-you-do-anything.html Code P0421- Call Mitsu before you do anything! I

error code p0421 taken from: http://forums.evolutionm.net/lancer-troubleshooting/349095-code-p0421-call-mitsu-before-you-do-anything.html Code P0421- Call Mitsu before you do anything! Icalled my ...

NEED TO KNOW WHAT IS THI P0421 ERROR CODE ERROR CODE P0421 PO421:Warm Up Catalyst-below threshold (bank #1) CEL

my 1999 mazda 626 lx have a error code p0421 so how do i fix it email me at [email protected] tell me the causes and the solutions my 2001 mazda 626 V-6 have a error code p0421 & P0421 so how do ...

p0421 code bank 1 warm-up efficiency below limit p0421 code bank 1 warm-up efficiency below limit P0421 code is that the cat. converter is below efficiency. 99 per cent o the time the cat. needs to be

P0421 CODES AND C1201 WHAT DOES THIS CODES MEAN C1201 AND P0421 C1201 error code means that you have some problem in engine control system. Possible causes for P0421 error Warm Up Three Way Catalytic ...

Is it possible to get a P0421 code from the OBD computer when the engine light is not on? Yes it is and it would mean that the problem that caused the P0421 has either been corrected or is ...