Powertrain
generic / SAE
P28E1
Shift Motor Phase U-V-W Circuit High
The output stage for the shift motor reports a high phase voltage on at least one of the U/V/W phases. Short to B+ or interrupted load.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number8 / E1
Possible causes
- Phase wire shorted to B+ high
- Open motor winding medium
- Connector pins corroded - high contact resistance low
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
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 400–2200 €
- Estimated time: 2–8 h
- Component: shift motor
- Component: shift motor position sensor
- Component: tcm
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012