Changing O2 sensor
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Elder User
Joined: Jan 2003
Posts: 898
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Changing O2 sensor
Went to AutoZone to get "Service Engine Soon" lite checked out. He said it was the O2 sensor on bank 1. Then he tells me that I have 2 of them.
My questions... Where are they & how hard is it to change them? Will I be OK with just one or do I really need 2 ?
My questions... Where are they & how hard is it to change them? Will I be OK with just one or do I really need 2 ?
Junior User
Joined: Jul 2004
Posts: 95
Likes: 0
From: Ashland City, TN
Difficult but not impossible job. There is a sensor before and after the catalytic converter on each side. Statistically it is the front sensor that goes bad. Spend a few minutes and spray some pb blaster or wd40 liberally on a COLD exhaust. Allow it to soak in for a while, and hopefully they will come right out. They are a simple wire connector and then screw the new one into place. Again coat the new sensor with some antiseize. You will need a special socket, available at most auto parts stores, and some time and patience. Expect to bloody some knuckles, but also expect some milage and possible performance gains if you replace all 4. DO NOT buy these from the factory, the BOSCH parts you will get at auto parts house are as good if not better.
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