O2 Sensor?? Where is it?
Thread Starter
|
Freshman User
Joined: Dec 2002
Posts: 29
Likes: 0
From: dallas usa
O2 Sensor?? Where is it?
Where is the O2 sensor located on my '99 EXPO XLT? The parts shop is asking if it is before or after the CAT Converter? Also is there a way I can determine if the problem that I am having is related to the CAT and not the O2 sensor? Please help........
Hotshot
Joined: Aug 2002
Posts: 12,679
Likes: 15
From: BC, Canada
O2 Sensor?? Where is it?
You'll have to go by the trouble code you are getting when you scan the system to know which O2 is the problem. The sensor behind the catalytic convertor isnt really used as an oxygen sensor...it is used to monitor the cat to make sure it is working properly. The front O2s are mounted in the Y-pipe, one on each side.
