P26D3 code meaning
Engine Coolant Pump Supply Voltage Circuit
Powertrain system Generic code P26xx codes Check engine light
What P26D3 means
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.
P26D3 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.3 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P26D3
- Check engine lamp on
- Engine temperature climbing quickly
- U019F stored at the same time
Common causes of P26D3
- Most 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
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Smart coolant pump moduleSupply circuit
What each part of P26D3 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 6 | Area: computer (engine control module) and output circuits. |
| D3 | The exact fault in that area. |
What to do next
- Note P26D3 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P26D3
What does P26D3 mean?
P26D3 means "Engine Coolant Pump Supply Voltage Circuit". P26D3 concerns the power feed and ground of the engine coolant pump. It is a generic code, so it means the same on every make.
Is it safe to drive with P26D3?
Drive gently and only to a workshop. With P26D3 the car can go into limp mode (reduced power) to protect itself.
Will P26D3 fail an emissions test?
Yes, it can. P26D3 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P26D3 to fix?
Difficulty: medium. A typical repair takes 0.3 to 3 hours of work. This is a job for a workshop.
Will P26D3 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.