What does code P28E8 mean?

Q: What does code P28E8 mean?

Shift Motor Position Sensor Circuit High. P28E8 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the signal circuit of the shift motor position sensor, which is used to monitor the position of the shift motor in systems like transfer case or transmission range selection. The PCM expects the sensor signal to stay within a calibrated voltage range, and a high reading typically means the circuit is open, shorted to voltage, or the sensor itself has failed.

DTC codes / P28xx · Transmission / P28E8

P28E8Shift Motor Position Sensor Circuit High

P28E8 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the signal circuit of the shift motor position sensor, which is used to monitor the position of the shift motor in systems like transfer case or transmission range selection. The PCM expects the sensor signal to stay within a calibrated voltage range, and a high reading typically means the circuit is open, shorted to voltage, or the sensor itself has failed.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaTransmission

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.