P26C1Engine Coolant Bypass Valve D Range/Performance
- 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
- P26C1 means valve D works electrically but does not deliver the expected effect. Ford is the documented user, and on its plug-in hybrids valve D governs the cabin heating loop. Ford special service message 50325 and bulletin 22-2127 cover 2020–2022 Escape and 2021–2022 Corsair PHEVs that set P2183 for the second coolant temperature sensor, at times with an overheat warning; P26C1 can follow as a consequence. The root cause was a PCM soak timer that miscalculated how long the electric cabin heater had been off, so the fix is reprogramming several modules, starting with the PCM; checking coolant level and the ECT 2 connector came first. Ford's public summaries give no thresholds for P26C1. Diagnose P2183 before replacing the valve.
- What you may notice
- Check engine light
- Engine overheat message in the cluster
- P2183 stored at the same time
- Likely causes
- LikelyPCM software miscalculating heater soak time (Ford PHEV)
- PossibleContaminated connector of coolant temperature sensor 2
- PossibleValve D moving slowly or sticking
- RareLow coolant level
- 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 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.