P28D6Clutch B Motor Driver Current/Temperature Too High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P28D6 tells that the electronic switch stage powering the clutch B motor has hit its overcurrent or overtemperature protection. Normally these pump actuators draw very little; Getrag quotes roughly 31 W (NEDC) and 33 W (WLTC) for the complete 7DCT300 actuation, so a stage running into its limits indicates the motor is working against unusual resistance or a fault in the stage itself. Candidates include a pump seized by particles, which Stellantis reports for the 7HDT300 actuator under P28D5, a shorted motor winding, or long stretches of high clamping demand while the clutch is already hot, as P27F3 would show. Wiring faults on the phases fall under P28D2-P28D4; the clutch A counterpart is P28D1. Limits are not public.
- What you may notice
- Clutch B shut down temporarily, may recover after cooling
- Transmission warning and restricted gears
- May appear together with P27F3 or P28D5
- Likely causes
- LikelyClutch B pump seized by particles, motor stalls and draws excess current
- PossibleTurn-to-turn short in the clutch B motor winding
- PossibleProlonged high pressure demand with hot clutch, e.g. stop-and-go or towing
- RareDefective output stage or poor heat transfer in the controller
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €150 – €1,800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.