Powertrain, generic (extended)

P26CE Engine Coolant Pump Overspeed/Air In System

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P26CE covers a pump that spins too fast for the current it draws – a sign that it is running dry or pumping air instead of coolant. Ford's hybrid OBD summaries spell out the check: the electronics in the pump report a dry-run state over LIN when speed exceeds 4,909 rpm while current stays too low, and the PCM sets the code after five seconds. Toyota lists P26CE with a 37 suffix among the A25A codes in Tech Tip T-TT-0714-22 for 2022–2023 hybrids and petrol models. Mercedes-Benz names it in information LI20.00-P-071399 for M256 engines built 07/2019 to 02/2020, together with a coolant temperature warning, and asks to check for leaks and trapped air. Unlike P26CB the pump is free to turn here, but coolant is missing around it, so the level should be checked first.

Likely causes

Low coolant level from a leak
Air pockets left after coolant service or pump replacement
Impeller loose or broken on the pump shaft

Symptoms

  • Coolant temperature warning in the cluster
  • Check engine lamp on
  • Gurgling noises or poor heater output

Repair estimate

DifficultyMediumDIY possible
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

engine coolant pumpcooling systemcoolant reservoir

Related codes

P26CBP26CAP26D2P0217

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