What does code P28E4 mean?

Q: What does code P28E4 mean?

Shift Motor Driver Current/Temperature Too High. P28E4 indicates that the control module monitoring the shift motor driver has detected either excessive current draw or an internal temperature that exceeds its safe operating limit. The driver circuit is the electronic stage that supplies and regulates power to the shift motor, and the module flags this code when current or heat rises beyond the calibrated threshold for the commanded shift effort.

DTC codes / P28xx · Transmission / P28E4

P28E4Shift Motor Driver Current/Temperature Too High

P28E4 indicates that the control module monitoring the shift motor driver has detected either excessive current draw or an internal temperature that exceeds its safe operating limit. The driver circuit is the electronic stage that supplies and regulates power to the shift motor, and the module flags this code when current or heat rises beyond the calibrated threshold for the commanded shift effort.

SystemPowertrain

Code typeGeneric (all makes)

SeverityHigh

Fix difficultyProfessional

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.