What does code P26BF mean?

Q: What does code P26BF mean?

Engine Coolant Bypass Valve D Control Circuit High. P26BF means the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for the engine coolant bypass valve D, which is a valve that routes coolant around the radiator to speed warm-up. The PCM commands the valve by pulling the circuit to ground, and a high voltage reading tells the module that the circuit is open, shorted to power, or that the valve's internal coil has failed.

DTC codes / P26xx · Computer and output circuits / P26BF

P26BFEngine Coolant Bypass Valve D Control Circuit High

P26BF means the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for the engine coolant bypass valve D, which is a valve that routes coolant around the radiator to speed warm-up. The PCM commands the valve by pulling the circuit to ground, and a high voltage reading tells the module that the circuit is open, shorted to power, or that the valve's internal coil has failed.

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.