2017 Q50 Red Sport 400 RWD
I needed to verify the harness was the culprit and a Posi-Tap was the fastest way to verify the DTC. You'll see what I mean when you do the passenger side A/F sensor connectors. Do you think I'd want to puncture the wire if the harness worked properly?
The proper name is A/F sensor so as not to confuse it with the heated O2 sensor located in the LDP.
Understood. But since the trouble code told you which bank it was, I think I would have sooner swapped harnesses than go for the posi-tap. I worry that, with the sensor wires being so skinny, the tap will literally sever the wire. I think you might need to leave at least the the T-tap portion of the posi-tap in place, even if you decide to use the harness. What do you think?