Powertrain, generic (extended)

P26D7 Engine Coolant Pump Clutch Performance/Stuck Off

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P26D7 is the serious case for a clutched coolant pump: the module has asked the clutch to couple the pump, but the cooling system shows no sign of circulation, so the pump is assumed to stay disconnected. The electrical side may be intact; worn friction faces, a seized armature or a pump that slips under load are typical mechanical reasons. No manufacturer documents P26D7 in public. A comparable failure is documented by Jaguar Land Rover bulletin JLRTB02030NAS1 for its switchable pump on Ingenium 2.0 L petrol engines, though under the general pump code P26CB: when the inner shroud did not move as commanded, the PCM ran the fans at full speed to protect the engine. Without coolant flow the cylinder head heats up locally, so the temperature gauge must be watched and the car should not be driven hard.

Likely causes

Worn or slipping clutch friction surfaces
Armature or switching mechanism seized in the disengaged position
Slipping or damaged pump drive belt
Implausible coolant temperature input or outdated engine software

Symptoms

  • Check engine light on
  • Coolant temperature rises quickly, possible overheating warning
  • Radiator fans run at high speed
  • Reduced engine power to protect the engine

Repair estimate

DifficultyHardWorkshop job
Parts and labour€250–1,300
Time1.5–4 h

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

Parts involved

coolant pump clutch

Related codes

P26D6P26D8P26CBP0217

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