Powertrain, generic (extended)

P2D09 Motor Electronics Coolant Pump B Control Module Overtemperature

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

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.

Likely causes

Low coolant or air, so pump B electronics lose their cooling

Restricted line or clogged component raising pump load and current

Internal defect of the pump B control board

Symptoms

Code appears mainly in hot weather or under sustained load
Pump B switches off temporarily
Warning lamp and reduced power

Repair estimate

DifficultyMediumWorkshop job

Parts and labour€60–900

Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

motor electronics coolant pump bpower electronics coolant loop

Related codes

P2D08 P2D05 P2D04 P2D0E P0C74

References: fordservicecontent.com, static.nhtsa.gov, law.cornell.edu.