P28E0Shift Motor Phase U-V-W Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- The shift motor is the three-phase electric motor of an electronic range actuator: in shift-by-wire systems it turns the detent plate and selector shaft between P, R, N and D. A Denso patent describes such a motor whose driver energises the U, V and W phases in turn, with a motor relay in the supply; Hyundai Kefico sells its SBW actuator with a brushless motor. P28E0 reports a phase voltage below what the driver commands, typically a phase lead or winding shorted to ground. No manufacturer documents P28E0 publicly; Hyundai lists the open-circuit sibling P28E2. CARB requires circuit checks on outputs. The controller usually cuts the motor off, so the selected range can no longer be changed and the car may be stuck in P.
- What you may notice
- Shift system warning in the cluster
- Selected range cannot be changed, vehicle may stay in Park
- Engine may not start because Park or Neutral is not confirmed
- Likely causes
- LikelyPhase lead to the actuator chafed and shorted to ground
- PossibleMotor winding shorted to the actuator housing (moisture, insulation damage)
- RareOutput stage in the shift control unit faulty
- Repair
- Hard · Usually a job for a workshop.Typical cost: €150 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.