× 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: No you can't use the O2 sensors to judge a cat
Posted to Emissions Forum on 1/21/2011 7 Replies

[...trimmed text...]

no . but what do you think was wrong . i NEVER use pre and post to diagnose a cat . i use an intrusive test .

it wasn't my point to diagnose , but the rear O2 does provide insight

Login to read more.

7 Replies Received (View Replies)