P26F6
Coolant Pump C Control Circuit High
Voltage on the third coolant pump control line is above the expected window. Typical causes are a short to battery or an open motor winding.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Control wire shorted to B+Common
- Open motor windingPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Coolant Pump C
- Wiring Harness
P26F6 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.