What does code P26D1 mean?

Q: What does code P26D1 mean?

Engine Coolant Pump Control Module System Voltage High. P26D1 indicates that the engine coolant pump control module has detected a voltage on its power supply circuit that is higher than the manufacturer's specified range. The module monitors its supply voltage and sets this code when the voltage exceeds the normal operating threshold, typically around 16 volts or more, which can disrupt pump operation and potentially damage the module.

DTC codes / P26xx · Computer and output circuits / P26D1

P26D1Engine Coolant Pump Control Module System Voltage High

P26D1 indicates that the engine coolant pump control module has detected a voltage on its power supply circuit that is higher than the manufacturer's specified range. The module monitors its supply voltage and sets this code when the voltage exceeds the normal operating threshold, typically around 16 volts or more, which can disrupt pump operation and potentially damage 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.