× 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: GM dealer says P0420 caused by downstream sensor. What say you?
Posted to Technical Discussion Forum on 3/9/2007

Interesting read. Although I must say that it seems to me it would be very difficult to achieve the exact conditions that Edwin posted. I am not arguing that it happened....it obviously did and can. Edwin mentioned that he had two possible theories on what was... Login to read more.