It will cycle on closed loop, then under acceleration, it drops to like 33 MV.... No throttle it cycles again. Getting a code for low voltage on bank 1 sensor 1. Replaced it with no change. I'm stumped....

21-02-09 18-40-42.hpl

2000 gmc jimmy 4x4 tune 10 DFCO gone fuel smoothed timing advance O2 fix.hpt