P26CAEngine Coolant Pump Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Many engines replace the belt-driven water pump with an electric pump that has its own control electronics. P26CA flags a fault in the control connection to that pump. In the Ford 2.0 L hybrid system the pump is commanded over LIN and also has a backup run line wired to ignition; the PCM compares the state of this line reported by the pump with the real ignition state and sets P26CA after five seconds of mismatch. Toyota applies it to A25A engines (Camry, RAV4, Highlander, Sienna and Venza, 2020–2024) use the code with suffixes for a grounded or broken circuit and for a missing signal, in some cases with coolant leaking from the pump into its connector. Ford service messages 46857 and 47790 trace it to water in harness connectors. The pump may run on a fallback speed or stop.
- What you may notice
- Check engine lamp on
- Rising coolant temperature or temperature warning
- Coolant traces at the electric pump
- Likely causes
- LikelyWater or corrosion in the pump connector or harness connectors
- PossibleCoolant leaking from the pump body into its electronics
- PossibleBroken control or backup run wire between module and pump
- 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 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.