P2D0BMotor Electronics Coolant Pump C Overspeed/Air in System
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2D0B is stored when pump C of the motor electronics loop reaches a speed above the commanded value. Since a pump with air around its impeller loses load and accelerates, the code is first of all a hint at a low level, a leak or incomplete bleeding; a third pump in a branch that sits high in the vehicle is especially prone to trapping air. No manufacturer publicly documents P2D0B. A published example of the same fault on another pump exists: on certain 2022–2023 F-150 Lightning trucks Ford found P2D06, the pump B version, after leaking battery coolant tubes (programme 23B09). In Ford's 2024 summary, overspeed together with dry running forms fault type B1. Fill and bleed per the service procedure and pressure-test the loop. A stalled pump C is P2D0A, a slow one P2D0C. Left alone, the electronics heat up and power drops.
- What you may notice
- Warning lamp on, sometimes without other effects
- Coolant level below minimum or visible leak traces
- Gurgling noise from the pump area
- Likely causes
- LikelyAir trapped in the pump C branch after incomplete bleeding
- LikelyCoolant loss through a leak in the loop
- RareLoose impeller or false speed signal from the pump
- 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: €40 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.