P2B9ECoolant Pump A Control Module Overtemperature
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2B9E is raised by the electronics built into coolant pump A when their temperature gets too high; the pump then derates or shuts down to protect itself. Ford's 2024 OBD summary for gasoline engines lists it as fault type 98 (system over temperature) of the cabin-heating auxiliary pump, monitored continuously once the battery supplies 11 V or more. The drive stage is usually cooled by the coolant it moves, so heat builds up when the pump runs dry or partly in air, when a stiff impeller makes the motor work harder, or when the pump sits close to hot exhaust parts; an ageing power stage can add to it. Check level and bleeding first, then free rotation. Pump B has P2B64, pump D P2B6B. Air alone often shows as P2B86 first.
- What you may notice
- Cabin heat drops off after some time of driving
- Check engine light
- Pump stops and restarts after cooling down
- Likely causes
- LikelyLow coolant or air at the pump, so the electronics lose cooling
- PossibleStiff bearing or impeller raising motor load
- RareHeat from nearby exhaust parts or damaged heat shield
- RareAgeing power stage in the pump electronics
- 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: €50 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.