OBD-II code · Powertrain (generic, extended)
P28DE Clutch B Pressure Sensor Circuit High
Voltage on the clutch B pressure sensor signal line is above the expected window. Wire shorted to B+ or sensor open.
Is it safe to drive with P28DE?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySignal wire shorted to B+
- PossibleOpen pressure sensor
- Less likelyConnector pins corroded - high contact resistance
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
- P28CFClutch A Pressure Sensor Circuit High
- P28DBClutch B Motor Position Sensor Circuit Range/Performance
- P28DCClutch B Pressure Sensor Circuit/Open
- P28DDClutch B Pressure Sensor Circuit Low
- P28DFClutch B Pressure Sensor Circuit Range/Performance
- P28E0Shift Motor Phase U-V-W Circuit Low
- P28E1Shift Motor Phase U-V-W Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.