P26CEEngine Coolant Pump Overspeed/Air In System
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- Coolant temperature warning in the cluster
- Check engine lamp on
- Gurgling noises or poor heater output
- Likely causes
- LikelyLow coolant level from a leak
- PossibleAir pockets left after coolant service or pump replacement
- RareImpeller loose or broken on the pump shaft
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €20 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.