P0420 Code on 2005 Toyota Corolla

Can a P0420 Error Code show up when a ECM is defective? What the code points toward is the Catalytic Convertor being bad? Can the Cat actually be good, it's just the ECM defective, and throwing the code in error?

by in Franklin, MA on April 17, 2011
1 answer
ANSWER by on April 18, 2011
Anything can happen when an ECM fails, including generating false codes. P0420 through P0429 are catalytic converter codes. Codes that refer to the catalytic converter don't always mean that the converter is bad, they are diagnostic clues, not always the answer in themselves. Diagnosis by an experienced person, using codes and data are the way to diagnose catalyst questions. If you want to find a specialist, here's a directory link for you: https://repairpal.com/directory?address=02038&car_brand_names=Toyota
Related Items:
how to check to make sure cat. converter is bad
Hello, I would like to answer me in a serious problem i have with my car (Toyota Corolla 2003 1.6 sol). The Check Engine Light in my car illuminates and stays on, and there are not performance p...
engine light on code p0420
code p0420 how can i repair this problem
Before that I have a code that the auto zone guy said it was a oxygen secer I never replaced and just reset now it says p0420 bad cat. I runs great should start by cleaning maf or what lol

Related Content