Powertrain, generic (extended)

P26F8 Coolant Pump C Stuck/Stalled

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P26F8 is about mechanics rather than wiring: coolant pump C is powered and commanded but its rotor does not turn or stops under load. Smart pumps recognise this themselves from a high motor current at little or no speed, and report it to the controlling module. Debris or deposits in the pump housing, a seized bearing, a rotor stuck after a long standstill or ice in the loop are typical reasons. No manufacturer documents P26F8 in public. Ford describes the same principle for its electric engine coolant pump under P26CB: the pump electronics see excessive current at too low a speed, try to restart four times and only then report the fault, which the PCM logs after five seconds. CARB requires such functional faults of emission-relevant components to be detected. The loop served by pump C then has no circulation.

Likely causes

Seized bearing or rotor in pump C
Debris or deposits in the pump from contaminated coolant
Frozen coolant from an incorrect mixture

Symptoms

  • Check engine light on
  • Heating or component cooling of the affected loop fails
  • Pump may hum without turning

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€150–900
Time0.8–3 h

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

Parts involved

coolant pump ccooling system

Related codes

P26FAP26F9P2C48P2BA0P26CB

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