× 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: REAR O2 SENSOR SHOULD IT BE STEADY LOW OR STEADY HIGH
Posted to Emissions Forum on 2/11/2009

[...trimmed text...]

YES.

Rear o2 voltage is what the PCM wants it to be. Some times the voltage can be high, some times it wants it to be low. That being said, there are times when the rear sensor voltage is very help... Login to read more.