CHEVY LOCATION AND NUMBER OF O2 SENSORS

2004 Chevrolet Impala

Tiny

MrStone2007

February, 7, 2008 AT 8:15 PM

Engine problem
2004 Chevy Impala 6 cyl Two Wheel Drive Automatic 65000 miles

My Impala has been pulling an OBD code for the Bank 1 Sensor 1 oxygen sensor, but I can not find it. I can only seem to find one before the catalytic converter and one after, so am I overlooking one or are there only 2? If there are only 2, why would the same code continue to flash if the 2 sensors were replaced? Please help.

FOUND 691 RELATED QUESTIONS

2 Answers

Tiny

dennyp

February, 13, 2008 AT 10:34 AM

The one before the converter is the correct sensor. Just because you have an O2 sensor code, doesn't mean a bad O2 sensor. You could have a bad converter or a fuel mixture problem. Can you post the code number for me please?

Tiny

MrStone2007

February, 26, 2008 AT 5:19 PM

The code it is pulling is P0135. I have replaced the one before the catalytic converter, but the problem persisted which led me to believe there is another one I can not find.

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