× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Re: Cat Efficiency. a bad O2 sensor?
Posted to Technical Discussion Forum on 2/9/2009 1 Reply

[...trimmed text...]

But that would be a cat problem, not an O2S failure. Again, I'm looking for examples of O2S failures and how did it affect the efficiency test in a way to cause a P0420.

Login to read more.

1 Replies Received (View Replies)