P26F7Coolant Pump C Supply Voltage Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- Unlike P26F4 to P26F6, which concern the control signal, P26F7 points to the power feed of coolant pump C: the voltage arriving at the pump is missing or implausible. A blown fuse, a relay with burnt contacts, a broken feed wire or a loose ground are the usual causes; a weak battery during cranking can also trigger it. No manufacturer documents P26F7 in public. Ford shows how such a supply fault is detected for its electric engine coolant pump: under P26D3 the PCM concludes that the feed has failed when pump communication is lost and coolant temperature still rises by more than 10 °C. CARB requires electrical faults of monitored components to be found. Without power the pump stops completely, so the loop it serves – heater, low-temperature or component cooling – loses flow until the feed is restored.
- What you may notice
- Check engine light on
- Pump C does not run at all
- Further codes for the same fuse or for low voltage
- Likely causes
- LikelyBlown fuse or faulty relay in the pump C feed
- PossibleBroken feed wire or loose, corroded ground
- RareLow system voltage from a weak battery or charging fault
- 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: €30 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.