OBD-II code · Powertrain (generic, extended)
P28DA Clutch B Motor Position Sensor Circuit/Open
The TCM cannot read a valid signal from the clutch B motor rotor position sensor. Open wiring or sensor failure.
Is it safe to drive with P28DA?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyOpen in sensor signal wire
- PossiblePosition sensor failed
- Less likelyPin pushed back out of connector body
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.