Today I had a the chance to drive it to work, and I'm hoping the problem I had is related to the P0122 error. Nearly every time I slowed down in traffic, the RPMs would drop below 500, and the car stalled. In rush hour traffic this afternoon, it was quite a pain! I made sure the only code is still the P0122. Checked for freeze information, just in case, but my scan tool says the computer didn't save anything. I'll have the chance for a multimeter test tomorrow morning. I have another new TPS, so I can put it on if that's what the tests show for my Impala and GP.