Powertrain, generic (extended)

P2D07 Motor Electronics Coolant Pump B Underspeed

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2D07 is the underspeed report for the second motor electronics pump: B is moving, so it is not stalled as in P2D05, yet its actual speed stays well short of the request for too long. Friction in a worn bearing, a partly obstructed impeller, a pump motor that has lost strength or a supply that drops when the pump draws current are the usual chain of suspects. No manufacturer publicly documents P2D07. The closest published logic is Ford's: its 2024 summary keeps under-speed (B2) as a distinct fault type for auxiliary pumps, checked continuously above 11 V for 5 s, and its 2020 hybrids store the pump A version, P2D02. CARB wants the electronic outputs that cool the inverter checked for function. Measure supply and ground under load before replacing the pump. Temperatures climb and power may be capped.

Likely causes

Worn bearing or friction inside pump B
Impeller partly obstructed by deposits or debris
High resistance in feed or ground causing the voltage to sag under load
Pump motor or its electronics losing performance with age

Symptoms

  • Warning lamp on
  • Pump B speed in live data clearly below the target value
  • Power limitation during long climbs or towing

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

P2D05P2D06P2D02P2D0CP0C74

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