P2D09Motor Electronics Coolant Pump B Control Module Overtemperature
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2D09 is raised when the controller inside motor electronics coolant pump B reports that it has become too hot. The pump's own electronics are cooled by the fluid it moves, so the code often follows dry running, a blocked line that makes the motor draw high current, or a mounting spot exposed to heat; an internal defect in the pump board is the other possibility. No manufacturer publicly documents P2D09. Ford's 2024 summary contains the same fault category (98, system over temperature) for its auxiliary pumps, while on pump A the 2020 Ford hybrids log P2D04, which the bulletins cured with new software. Unlike the supply code P2D08 the wiring is usually fine here. When the pump throttles itself, the inverter it serves can overheat and the drive limits power.
- What you may notice
- Code appears mainly in hot weather or under sustained load
- Pump B switches off temporarily
- Warning lamp and reduced power
- Likely causes
- PossibleLow coolant or air, so pump B electronics lose their cooling
- PossibleRestricted line or clogged component raising pump load and current
- PossibleInternal defect of the pump B control board
- 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: €60 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.