P0125 Engine Coolant Temperature (ECT) Insufficient for Closed Loop Fuel Control
A buddy and I are tuning a '14 Charger. We set the ECT Rear up to 374* to take the rear O2's out of the picture in closed loop and after a while it tripped the PO125 DTC. It seems to make sense but I have the same setting on my '13 Challenger RT, as do others, and I've never thrown this code.
I'm aware of this code being reported on several stock vehicles but this just started after his tune so I suspect it's related to the ECT Rear. Has anyone else experienced this?