Jeep ESP light on and code C123F — needs alignment

Jeep ESP light on and code C123F

If you notice the Electronic Stability Program (ESP) light is on and a C123F is stored, chances are you’ll need an alignment and a steering angle sensor re-calibration. The steering angle sensor can be knocked out of calibration during service if you turn the wheels by hand instead of turning using the steering wheel.

C123F-STEERING ANGLE SENSOR COMPARATIVE PERFORMANCE

If you have a scan tool, set the wheels to the straight ahead position. The read the steering angle sensor in live data. It should read ±15°. If it does, perform an ECU initialization (if your scan tool has that feature.

If not, get an alignment.

©, 2022 Rick Muscoplat