OBD-II code · Powertrain (generic, extended)
P28DB Clutch B Motor Position Sensor Circuit Range/Performance
The clutch B motor position signal does not correlate with the commanded commutation. Sensor offset or signal integrity degraded.
Is it safe to drive with P28DB?
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
- 2–6 h
- Emissions test
- Usually unaffected
- Parts involved
- Clutch Motor Position Sensor B, Wiring Harness, Tcm
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.