I HAVE P0420 AND THE ORIGINAL ECM

  • Tiny
  • Anonymous
  • 2001 Toyota Sienna
  • 270,000 miles

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

1 Answer

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,551 posts

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

Roy

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Wednesday, December 19th, 2012 AT 1:01 AM

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