P26CBEngine Coolant Pump Performance/Stuck Off
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P26CB means the engine coolant pump does not deliver the expected work, typically because the impeller is blocked or turns too slowly. Ford's OBD summaries for hybrids let the pump's own electronics judge this from current and speed: too much current at too low a speed through four restart attempts is reported over LIN, and the PCM records P26CB after five seconds. Genesis campaign 916G (GV70 3.5 T, 2024–2025) replaces the electric pump of the water-cooled charge air cooler because a stuck impeller set P26CB. Jaguar Land Rover bulletin JLRTB02030NAS1 links it on Ingenium 2.0 L petrol engines to a switchable mechanical pump whose diverter shroud no longer moves, making the fans run at full speed. Toyota's A25A engines log it as speed stuck. Overheating protection may cut power.
- What you may notice
- Check engine lamp on
- Cooling fans running constantly at high speed
- Rising engine temperature or reduced power
- Likely causes
- LikelySeized or obstructed impeller in the electric pump
- PossibleDiverter shroud of a switchable mechanical pump not moving
- PossibleWorn pump motor or bearing drawing excessive current
- RareEngine module logic needing a software update
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.