What does code P26F6 mean?

Q: What does code P26F6 mean?

Coolant Pump C Control Circuit High. P26F6 means the engine control module (ECM) has detected a high-voltage condition on the control circuit for coolant pump C, which is an auxiliary electric pump used for charge-air cooling or battery thermal management on many modern vehicles. The ECM commands the pump on or off via a low-side driver, and it monitors the circuit for an unexpected high voltage that indicates an open circuit, a short to power, or a failed driver inside the module.

DTC codes / P26xx · Computer and output circuits / P26F6

P26F6Coolant Pump C Control Circuit High

P26F6 means the engine control module (ECM) has detected a high-voltage condition on the control circuit for coolant pump C, which is an auxiliary electric pump used for charge-air cooling or battery thermal management on many modern vehicles. The ECM commands the pump on or off via a low-side driver, and it monitors the circuit for an unexpected high voltage that indicates an open circuit, a short to power, or a failed driver inside the module.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaComputer and output circuits

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.