P26D3Engine Coolant Pump Supply Voltage Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P26D3 concerns the power feed and ground of the engine coolant pump. On Ford's 2.0 L hybrids the pump module has no way of reporting a loss of these lines, since without power it goes quiet on the LIN bus. The PCM therefore draws a conclusion: if pump communication is lost (U019F) and the coolant has meanwhile warmed by more than 10 °C, it assumes the pump has stopped and sets P26D3 after five seconds; without the temperature rise only the communication code is stored. Ford's Boss 302S code list also contains P26D3. Typical causes are a blown fuse, a failed relay, a broken feed or a loose ground. As the pump does not run, the engine can overheat quickly, so the car should not be driven far.
- What you may notice
- Check engine lamp on
- Engine temperature climbing quickly
- U019F stored at the same time
- Likely causes
- LikelyBlown pump fuse or failed supply relay
- PossibleBroken power feed or loose ground at the pump
- PossiblePump electronics dead so that the pump neither runs nor communicates
- 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: €20 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.