Powertrain, generic (extended)

P2DFB Coolant Pump E Control Module Overtemperature

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

Electric coolant pumps carry their own driver electronics, and P2DFB reports that those of coolant pump E have run too hot. Which loop pump E serves differs between makers. No manufacturer documents P2DFB publicly, but its siblings show the pattern: Ford's 2024 gasoline summary lists over temperature as fault type 98 of its auxiliary pumps A and B, watched continuously from 11 V with a 5 second monitoring time, and Ford's 2019 hybrid summary lets the engine coolant pump send its module temperature over LIN, setting P26D2 above 130 °C for 5 seconds. Because the liquid it moves also cools the electronics, low level, trapped air, a stiff impeller or heat from nearby exhaust parts are the usual triggers. The pump then slows or stops, and the served loop may overheat.

Likely causes

Coolant level too low or air trapped in the pump, so the electronics lose their cooling

Impeller or bearing running stiff, motor draws high current and heats up

Driver electronics inside pump E faulty or reporting temperature wrongly

Heat shield missing or pump too close to hot exhaust or turbo parts

Symptoms

Warning lamp or message about the cooling system
Reduced cabin heating or cooling of the component served by pump E
Pump runs at reduced speed or stops for a while, often together with air or stall codes

Repair estimate

DifficultyMediumWorkshop job

Parts and labour€80–700

Time0.5–3 h

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

Parts involved

coolant pump e control module

References: fordservicecontent.com, fordservicecontent.com, law.cornell.edu.