2003 S6 - Oxygen Sensor Issues (2003 S6)

[atbro199]

ECM was repaired but still had an issue with the grounding, so the solution was to splice the grey grounding wire from B1S2 into B2S2 (between the sensor and the connector; didn't touch the harness). It worked! This allowed the readiness monitors to set and I passed emissions, finally fully registering the car. Still going strong several weeks later.