P2D05Motor Electronics Coolant Pump B Stuck/Stalled
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2D05 opens the pump B block of the motor electronics series: the second electric pump in the loop that cools inverters and drive-motor electronics is commanded and supplied, yet its rotor does not move. Where a vehicle has two electric drive units, B may be the pump serving the second inverter. A seized bearing, debris after a coolant change, a burnt winding or coolant that froze in a weak mixture can lock it. No manufacturer publicly documents P2D05. Ford's 2024 summary shows the fault type as actuator stuck (71) for its auxiliary pumps, and on pump A the 2020 Ford hybrids store the equivalent P2D00. CARB requires the outputs of inverter thermal management to be monitored. Slow running is P2D07, overspeed P2D06. A stalled pump cuts flow, so derating and warnings follow.
- What you may notice
- Malfunction or hybrid system warning lamp on
- No pump noise or vibration when the pump should run
- Rising temperature of the second inverter, power limited
- Likely causes
- LikelySeized bearing or blocked rotor in pump B
- PossibleDebris or deposits in the loop after repairs or coolant change
- PossibleFailed motor winding or pump electronics unable to start the motor
- RareCoolant frozen because the antifreeze ratio is too low
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €100 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.