Powertrain, generic (extended)

P2D01 Motor Electronics Coolant Pump A Overspeed/Air in System

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P2D01 is logged when the first electric pump of the motor electronics loop, which carries heat away from the inverter and drive-motor electronics, spins faster than commanded. A centrifugal pump that suddenly has nothing to push races, so the title points straight at air or a low coolant level. Ford lists P2D01 on 2020 hybrids: bulletin 20-2221 (Escape HEV built up to 10 June 2020, code in the BECM) and 20-2293/20-2345 (Explorer, Aviator and Police Interceptor Utility hybrid, code in the PCM). In both cases the degas bottle is checked first, and only with a correct level is the software update the fix, rated at 0.4 h. Ford's 2024 summary treats overspeed or dry running as its own pump fault type (B1). The seized pump is P2D00, slow running P2D02. Expect reduced power if the inverter heats up.

Likely causes

Low coolant level or trapped air in the motor electronics loop, for example after service work
Monitoring strategy in the control software (Ford 2020 hybrids, cured by reprogramming)
External leak at hoses, connectors or the pump housing that keeps drawing in air
Loose impeller or false speed feedback from the pump electronics

Symptoms

  • Malfunction indicator lamp on
  • Coolant level in the degas bottle at or below minimum
  • Gurgling or whining from the electric pump
  • Reduced drive power when the inverter runs hot

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€40–700
Time0.4–2.5 h

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

Parts involved

motor electronics coolant pump apower electronics coolant loop

Related codes

P2D00P2D02P2D03P2D04P2D06P2D0BP0C73

References: static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov, fordservicecontent.com.