are front and rear 02 supposed to read the same?
TECH Senior Member
Joined: Nov 2001
Posts: 7,036
Likes: 1
From: Lake Zurich, IL
drivers side and passenger side front should be pretty close (average at WOT should be close rather)
Front and Rear shouldn't be very close... the rears only tell the PCM if the cats are doing their jobs... other than that you can ignore whatever they report
if the 2 front O2 sensors are off by alot then could be a clogged injector, leaking valve cover gasket, if you have a valve cover breather , etc... . can all cause the readings to be slightly different between the fronts
Front and Rear shouldn't be very close... the rears only tell the PCM if the cats are doing their jobs... other than that you can ignore whatever they report
if the 2 front O2 sensors are off by alot then could be a clogged injector, leaking valve cover gasket, if you have a valve cover breather , etc... . can all cause the readings to be slightly different between the fronts
