What does code P26D5 mean?

Q: What does code P26D5 mean?

Engine Coolant Pump Supply Voltage Circuit High. P26D5 indicates that the engine control module (ECM) has detected an abnormally high voltage on the supply circuit for the engine coolant pump. The ECM expects the supply voltage to be within a normal range, but the signal is above the threshold, suggesting an open circuit, a short to voltage, or a faulty pump control module.

DTC codes / P26xx · Computer and output circuits / P26D5

P26D5Engine Coolant Pump Supply Voltage Circuit High

P26D5 indicates that the engine control module (ECM) has detected an abnormally high voltage on the supply circuit for the engine coolant pump. The ECM expects the supply voltage to be within a normal range, but the signal is above the threshold, suggesting an open circuit, a short to voltage, or a faulty pump control 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.