What does code P26F4 mean?

Q: What does code P26F4 mean?

Coolant Pump C Control Circuit / Open. P26F4 indicates that the powertrain control module (PCM) has detected an open circuit or control fault on the control circuit for coolant pump 'C', which is typically an auxiliary electric pump used for charge-air cooling, turbocharger cooling, or battery thermal management. The PCM commands the pump on and monitors the circuit for expected voltage or current feedback, and when the signal is missing or out of range, it sets this code and may disable the pump to protect the system.

DTC codes / P26xx · Computer and output circuits / P26F4

P26F4Coolant Pump C Control Circuit / Open

P26F4 indicates that the powertrain control module (PCM) has detected an open circuit or control fault on the control circuit for coolant pump 'C', which is typically an auxiliary electric pump used for charge-air cooling, turbocharger cooling, or battery thermal management. The PCM commands the pump on and monitors the circuit for expected voltage or current feedback, and when the signal is missing or out of range, it sets this code and may disable the pump to protect the system.

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.