P26F5Coolant Pump C Control Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P26F5 reports that the control circuit of coolant pump C is pulled too low. Bentley documents the code in the engine electronics of the Continental GT/GTC and Flying Spur. Bulletin 2058340/1 (Continental 2018–2019, cars without parking heater) blames internal corrosion of the additional coolant pump that shorts it out; cars built before 15 July 2019 get a pump from another supplier together with a new bracket. Bulletins 2078799/1 to /3 (2024 V8 models) describe the code as intermittent and caused by over-sensitive self-diagnosis of the heater auxiliary pump; after checking the wiring for corrosion and coolant ingress the pump is replaced, and Bentley states that heating and engine are not affected. In both cases the MIL is lit, so the code is emission-related despite the harmless symptom.
- What you may notice
- Check engine light on
- Often no noticeable change in heating or engine behaviour
- Fault may come and go (stored as intermittent)
- Likely causes
- LikelyInternal corrosion of the pump causing a short circuit
- PossibleOver-sensitive internal diagnosis of the pump (known pump part number)
- PossibleControl wire shorted to ground or coolant in the connector
- 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: €150 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.