P28D6 code meaning
Clutch B Motor Driver Current/Temperature Too High
Powertrain system Generic code P28xx codes Check engine light
What P28D6 means
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.
P28D6 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P28D6
- Clutch B shut down temporarily, may recover after cooling
- Transmission warning and restricted gears
- May appear together with P27F3 or P28D5
Common causes of P28D6
- Most 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
- Less likelyDefective output stage or poor heat transfer in the controller
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Clutch motor bWiring harnessTCM
What each part of P28D6 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 8 | Area: transmission. |
| D6 | The exact fault in that area. |
What to do next
- Note P28D6 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P28D6
What does P28D6 mean?
P28D6 means "Clutch B Motor Driver Current/Temperature Too High". P28D6 tells that the electronic switch stage powering the clutch B motor has hit its overcurrent or overtemperature protection. It is a generic code, so it means the same on every make.
Is it safe to drive with P28D6?
Drive gently and only to a workshop. With P28D6 the car can go into limp mode (reduced power) to protect itself.
Will P28D6 fail an emissions test?
Yes, it can. P28D6 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P28D6 to fix?
Difficulty: hard. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P28D6 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.