Powertrain, generic (extended)

P28D5 Clutch B Motor Phase U-V-W Performance

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Particles from the gearbox jamming a pump in the even-gear actuator (Stellantis 7HDT300)
Clutch B actuator motor running stiff or weak
Raised contact resistance on one phase causing uneven currents

Symptoms

  • MIL on, transmission warning shown
  • Even gears not available on the 7HDT300
  • Often logged together with clutch B temperature code P27F3

Repair estimate

DifficultyHardWorkshop job
Parts and labour€400–1,800
Time1–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

clutch motor bwiring harnesstcm

Related codes

P28D2P28D3P28D4P28D7P27F3P28C7

References: static.nhtsa.gov, law.cornell.edu, cti-symposium.world.