P28D5Clutch B Motor Phase U-V-W Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P28D5 means the clutch B motor wiring passes the electrical checks, yet the motor's behaviour, its phase currents and resulting rotation, does not follow what the controller demands. It is one of the few codes in this group with a public manufacturer reference: Stellantis bulletin 21-040-26 (May 2026), valid for Jeep Renegade and Compass of model years 2022-2025 sold in Europe with the 1.5 MHEV and the 7HDT300 hybrid DCT, pairs P28D5 with the clutch temperature code P27F3. That pair points at the actuator cylinder for the even gears; particles inside the gearbox can jam one of its pumps. The MIL is lit, and if the activation routine fails, the even-gear actuator is renewed with 3.0 labour hours allowed. P28C7 is the odd-gear twin.
- What you may notice
- MIL on, transmission warning shown
- Even gears not available on the 7HDT300
- Often logged together with clutch B temperature code P27F3
- Likely causes
- LikelyParticles from the gearbox jamming a pump in the even-gear actuator (Stellantis 7HDT300)
- PossibleClutch B actuator motor running stiff or weak
- RareRaised contact resistance on one phase causing uneven currents
- 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: €400 – €1,800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.