OBD-II code · Powertrain (generic, extended)
P26F4 Coolant Pump C Control Circuit / Open
The controller cannot drive the third electric coolant pump. Cooling demand of the connected loop (often hybrid power electronics or battery cooling) is not satisfied.
Is it safe to drive with P26F4?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen pump motor winding
- PossibleBroken control wire to the pump
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Usually unaffected
- Parts involved
- Coolant Pump C, Pump Relay, Wiring Harness
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.