i have a check engine light
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2002 Pontiac Aztek Question: looking for oxygen sensor 1 bank1 from from driver side
Answer #1torque wrench from Stewart's Auto Repair LLC, April 23, 2011, 09:58Master
Bank 1, sensor 1, will be the first sensor you get to before the cat. convertor. Start following the exhaust system from the front of the engine towards the back the first oxygen sensor you get to is the one you are looking for. You will need a 7/8" wrench to remove and install the new one. You will also need to have the code reset, this can be done at your local auto parts store free.