Hey guys, so my truck is throwing the following:
P0137 Mod10
O2 sensor
Circuit low volts
Bank 1 sensor 2

I've searched high and low yet I get varying results on which sensor that is. I think it is pre cat?

Now the second problem. I looked under there and no matter which sensor it is I can't locate the wiring harness that the senor plugs into. The wires run up so high that my hand can't reach up there, plus I can't access them from the engine compartment I must be missing something!!! ??? Thanks

PS: Its a 2004 Dak V6

 

Bank 1 Sensor 2 would be the O2 after the cat on the driver's side exhaust pipe. Bank 1 is the left exhaust pipe. Sensor 1 is before the cat, sensor 2 is after the cat.
Bank 2 is the right exhaust pipe. Same deal: Sensor 1 is before the cat, Sensor 2 is after the cat.

I don't know about the connectors for the downstream sensors. I replaced the upstream O2 sensors on my truck and the plug connector for the one on the left was clipped to a metal tab up on top of the transmission, if I remember it right. The plug for the downstream sensor may be on top of the trans or clipped off to the side somewhere.

Jimmy

 

i just had to replace the same one on mine then after that p0140 i believe it was after i had the same one

 

Thanks, my wires do head up to the top of tranny, however I just can't reach the harness with my hand to disconnect it! Any tricks you used?

 

I must have short arms or have extra stuff in the way! Did you have issues reaching it?

 

I did have some trouble finding the plugs, but I just stuck my head up in next to the trans the best I could and followed the wire harness back with my hand. I think I had to twist the connector 90 degrees and it came loose from the metal clip. Maybe if you have an inspection mirror and a good drop light it would be easier.

Jimmy

 

mine was a tab that i pushed in and then pulled it