2004 Chevy Trailblazer o2 sensor code

[roberson104]

HI, my service engine light keeps coming on after being reset, i keep getting a P0130 o2 sensor circuit malfunction bank 1 sensor 1 code. Can anyone tell me where it would be located on the exhaust system so I can replace it.

Thanks in advance

Brian

[Haulin' 8.1]

It will be underneath on the drivers side of the exhaust system about 5-8 inches from the exhaust manifold. It won't be on the pass side or behind the covertor(s). It looks kinad like a metal spark plug but a little fatter and it will have a four wire plug attached. If you get a new one and look at it first you'll see it right away. You'll need a 7/8" wrench to fit it.

 

Vernon

[roberson104]

Thanks, I know what they look like and have replaced them before on another type vehicle, from what i looked up on autozone's site there appears to be one before and after the converters. I just didn't know which one would be bank 1 sensor 1.