sorry if this is a repeat ? but I could not find this topic listed.

I drive a 96 Chevy c1500 5.7L v8...

So I was recently I replaced my bank 1 sensor 2 O2 sensor.

After changing it the check engine light did not got out. (disconected the battery to reset). So ran to A-Z to find out what the code was and got P0137.

I checked the wires visually and there are no cracks or worn parts. Also used a voltmeter to see if there was a drop in the wires and there wasn't. So I am confused as to why I am getting a low voltage during the scan. Could the O2 sensor be bad? The cat. was replaced <5k mil ago and there are no exaughst leaks.

Any ideas on what I could check?

 

Here's some info that might help:

http://www.obd-codes.com/p0137

If you are still getting the same code after replacing the sensor, I'm betting it's an open or short in one of the O2 harness wires somewhere.

 

thanks for the info. I used my voltmeter to check the harnesses and there were no problems there.

A buddy of mine said that sometimes this could be caused by a bad fuel pump. Is that possible?