OBD-II code · Powertrain (generic, extended)
P28EA Shift Motor Position Sensor Circuit Range/Performance
The shift motor position signal does not correlate with the commanded commutation. Sensor offset or signal integrity degraded.
Is it safe to drive with P28EA?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySensor mechanically offset
- PossibleElectrical noise on signal line
- Less likelySensor element aged beyond calibration window
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–8 h
- Emissions test
- Usually unaffected
- Parts involved
- Shift Motor, Shift Motor Position Sensor, Tcm
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.