P26F9Coolant Pump C Control Module Overtemperature
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- Electric coolant pumps carry their own control electronics, which are cooled by the liquid passing through the pump. P26F9 means the electronics of pump C have reported a temperature above their limit. That rarely points to a defect in the module itself; far more often coolant is missing around it, air is trapped in the pump, the impeller is partly blocked and draws high current, or the pump sits in a very hot spot. No manufacturer documents P26F9 in public. Ford's OBD summaries show how such a check works on the engine coolant pump code P26D2: the pump reports its temperature over LIN and the PCM stores the code once 130 °C is exceeded for five seconds. CARB requires electronic components that serve emission control to be monitored. The electronics usually derate or stop the pump to protect themselves.
- What you may notice
- Check engine light on
- Pump C runs at reduced speed or switches off temporarily
- Heating or cooling of the affected loop varies
- Likely causes
- LikelyLow coolant level or air trapped in pump C
- PossiblePartly blocked impeller causing high current
- RareFaulty temperature sensing in the pump electronics
- 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: €50 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.