OBD-II code · Powertrain (generic, extended)
P28DF Clutch B Pressure Sensor Circuit Range/Performance
The clutch B pressure signal does not match plausibility checks against actuator commands. Sensor drift or installation offset.
Is it safe to drive with P28DF?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySensor zero point drifted
- PossibleSensor mounting loose - bias offset
- 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
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Usually unaffected
- Parts involved
- Clutch Pressure Sensor B, Wiring Harness, Tcm
Related codes
- P28D0Clutch A Pressure Sensor Circuit Range/Performance
- P28DCClutch B Pressure Sensor Circuit/Open
- P28DDClutch B Pressure Sensor Circuit Low
- P28DEClutch B Pressure Sensor Circuit High
- P28E0Shift Motor Phase U-V-W Circuit Low
- P28E1Shift Motor Phase U-V-W Circuit High
- P28E2Shift Motor Phase U-V-W Circuit/Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.