OBD-II code · Powertrain (generic, extended)
P28EC Shift Motor Position Sensor Exceeded Learning Limit
The required adaptation offset for the shift motor position sensor exceeds the calibrated learning window. Sensor or mechanism out of nominal range.
Is it safe to drive with P28EC?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyMechanical wear shifted end-stops
- PossibleSensor reference drifted
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
Related codes
- P28E9Shift Motor Position Sensor Circuit Low
- P28EAShift Motor Position Sensor Circuit Range/Performance
- P28EBShift Motor Position Not Learned
- P28EDElectric/Auxiliary Transmission Fluid Pump B Overspeed
- P28EEElectric/Auxiliary Transmission Fluid Pump B Underspeed
- P28EFEngine Disconnect Clutch Actuator Performance/Stuck Off
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.