2000 c2500 5.7 cel

[20GMC00]

Originally Posted by MT-2500

Next step is to check the wiring out and see if sensor reading is getting to the VCM/PCM computer.

I checked the wiring lastnight and didnt find any obvious problems. So I switched the two rear sensor and now the problem is on the other side. It jumps from .000v to .450v over there. Are new sensors bad very often? Thanks.

[MT-2500]

Originally Posted by 20GMC00

I checked the wiring lastnight and didnt find any obvious problems. So I switched the two rear sensor and now the problem is on the other side. It jumps from .000v to .450v over there. Are new sensors bad very often? Thanks.

You are welcome.
I have not had any problems with new direct fit 02 sensors.
I usualy use bosh aftermarket from parts place.

You need to find a 02 sensor from another place.

Where you got that bad one may have a bad batch.

Good luck and let us know how it goes.