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Ive got a P0420 code appearing on a scan plus a check engine light. Is there any chance that its not a catalyst failure and that it might be...
After digging through some old posts, I can't find a sure-fire fix for the trouble code P0420 Catalyst System Efficiency Below Threshold (Bank 1)....
Had this CEL thrown a couple times now. Cleared and it comes back every couple days over the last couple weeks. Showed up after a AutoX I...