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My Express just got to the 430k mark and I just started experiencing error codes. How bad does this look? The van runs great (other than the apparent codes).
Error codes.
i would clear the codes.....get a good tank of gas....and check or replace your gas cap....then see what comes up.....a bad gas cap could cause the evap leak causing the engine to go lean then tripping the other codes.......it could just be a simple fix
P0420 - Catalyst system efficiency below threshold.
P0430 - Catalyst system efficiency below threshold.
P0455 - Evaporative emissions system leak detected (large leak).
I understand the basic code descriptions however I don’t really know how worried I should be or what a good course of action would be in order to keep this thing going strong to 500k.
i would clear the codes.....get a good tank of gas....and check or replace your gas cap....then see what comes up.....a bad gas cap could cause the evap leak causing the engine to go lean then tripping the other codes.......it could just be a simple fix
I’ll definitely try that. Are there any cons to clearing the codes? Or does that just allow you to make sure that the problem is real if/when the error codes return?
I had a bad gas cap once, and had no way to clear the codes after I replaced it (I was out of town). I was told it might take up to 100 miles before the codes cleared themselves.
the codes wont clear themselves........go on line and buy an obd2 reader....they are about $20......then you can clear the codes .....if they return fast you have a problem....sometimes a little problem like a gas cap can cause a cascade affect with codes....
September 24th, 2018, 2:57 PM
2005 Express With 430,000 miles
