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P Codes (Powertrain)
P0400 - P0499
I have P0420, and the original ECM
2001 TOYOTA SIENNA
I have P0420, and the original ECM.
If I were to go to a junkyard or Pick n Pull, how would I know if the used ecm was one of the ones with the updated ones with a good program?
Wednesday, December 19th, 2012 AT 12:59 AM
Never use a used pcm as it is flashed to another vehicle and will come up with a vin mismatch and all kinds of issues.
420 is a failed cat and needs to be replaced. Not the pcm
Wednesday, December 19th, 2012 AT 1:01 AM
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