Powertrain, generic (extended)

P2B9E Coolant Pump A Control Module Overtemperature

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P2B9E is raised by the electronics built into coolant pump A when their temperature gets too high; the pump then derates or shuts down to protect itself. Ford's 2024 OBD summary for gasoline engines lists it as fault type 98 (system over temperature) of the cabin-heating auxiliary pump, monitored continuously once the battery supplies 11 V or more. The drive stage is usually cooled by the coolant it moves, so heat builds up when the pump runs dry or partly in air, when a stiff impeller makes the motor work harder, or when the pump sits close to hot exhaust parts; an ageing power stage can add to it. Check level and bleeding first, then free rotation. Pump B has P2B64, pump D P2B6B. Air alone often shows as P2B86 first.

Likely causes

Low coolant or air at the pump, so the electronics lose cooling
Stiff bearing or impeller raising motor load
Heat from nearby exhaust parts or damaged heat shield
Ageing power stage in the pump electronics

Symptoms

  • Cabin heat drops off after some time of driving
  • Check engine light
  • Pump stops and restarts after cooling down

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–700
Time0.5–3 h

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

Parts involved

coolant pump awiring harnessecm

Related codes

P2B9CP2B9DP2B86P2B64P2B6BP26F9

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