04 oldsmobile alero cylinder 2 misfire

[knowledge1980]

Hello everyone

I been racking my brain trying to fix my car and it still acting the same. A week ago today my engine light came on and my car started driving rough so I assume I needed a tune up. I did the tune up and the engine light is still on and it still some what running and driving a little rough. I recheck all the wires and plugs and they are fine. I even bought a diagnostic reader and and when I did the test on my car it showed code p0137 and p0302 when i look up the codes p0137 it said something about 02 sensor low volt bank 2 and the other code is cylinder 2 misfire. Please help me out i'm like totally desperate and don't know what to do at this point. It's a 2004 oldsmobile alero v6 3.4 engine thank you in advance

[BNaylor]

Welcome to AF.

You need to get the 02 sensor problem resolved and it will probably take care of the misfire to Cylinder 2 due to a lean trim condition.

P0137 is 02 circuit voltage low bank 1 sensor 2. This is the 02 sensor after the CAT convertor.

The PCM has detected the 02 sensor circuit is shorted to low.

It could be a bad 02 sensor or the wiring/electrical connector to it and back to the PCM module.

[knowledge1980]

Ok

Where can I find the 02 sensor bank 1 and 2. I think i know where is one of them it's in the back under the 3 sparks in the back if i'm right

[BNaylor]

Originally Posted by knowledge1980

Ok

Where can I find the 02 sensor bank 1 and 2. I think i know where is one of them it's in the back under the 3 sparks in the back if i'm right

Bank 1, sensor 1, 02 sensor is located in the engine area by the firewall on the exhaust downpipe. 02 sensor bank 1 number 2 is on the output of the CAT convertor but before the resonator. You'll have to safely jack it up and crawl underneath to see it.