Quote Originally Posted by whathasnt View Post
I checked those and I'm getting 11.7 volts roughly on the one connection and 390mv roughly on the second. I don't know if these are right.

Still struggling to find something. I tried blowing smoke in near the intake and couldn't find any leaks that way and went to town with the carb cleaner again and still nothing.

I really need to get this fixed and starting to think it might be time to drop it off at the local garage at least for a diagnosis so I can stop guessing unless anybody has any other tips?

Yea, I guess that's right for a two wire sensor. The 12V is for the heater/supply and the other is for the return signal back to the PCM.

The PCM is not telling you that its running lean. It says that there is something wrong with the circuit itself. The PCM is not getting any feedback from the circuit whatsoever.

P0135 O2 sensor heating circuit
P0141 O2 sensor heating circuit
P0131 O2 sensor low voltage
P1133 HO2S switch from lean to rich - not enough times

This would indicate wiring, O2 sensor or something wrong with the PCM. A real-time scan will greatly improve your ability to diagnose this problem.