Powertrain, generic (extended)

P26D2 Engine Coolant Pump Control Module Over Temperature

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

The electronics of a smart coolant pump also measure their own temperature. P26D2 is set when this value climbs too high: in Ford's hybrid OBD summaries the pump module reports the temperature over LIN and the PCM stores P26D2 once it passes 130 °C for five seconds. The electronics are cooled by the coolant flowing through the pump, so overheating usually means poor flow – a low coolant level, trapped air, a partly blocked impeller drawing excessive current, or very hot under-bonnet conditions. Ford also uses the over-temperature state as a reason to suspend its pump communication check. The code differs from P0217, which concerns the engine coolant itself. The pump may reduce power or shut down to protect itself, so engine temperature can rise quickly.

Likely causes

Low coolant level or air around the pump reducing cooling of its electronics
Stiff impeller or bearing making the motor draw high current
Internal fault in the pump electronics or temperature sensor

Symptoms

  • Check engine lamp on
  • Engine temperature rising or temperature warning
  • Reduced heater output

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€20–1,200
Time0.5–3 h

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

Parts involved

smart coolant pump module

Related codes

P26CBP26CEP0217U019F

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