What does code P26CD mean?

Q: What does code P26CD mean?

Engine Coolant Pump Control Circuit High. P26CD indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for the engine coolant pump. The PCM expects the circuit to pull the voltage low when the pump is commanded on, but it sees the line staying near battery voltage, which points to an open circuit, a failed pump driver, or a wiring fault.

DTC codes / P26xx · Computer and output circuits / P26CD

P26CDEngine Coolant Pump Control Circuit High

P26CD indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for the engine coolant pump. The PCM expects the circuit to pull the voltage low when the pump is commanded on, but it sees the line staying near battery voltage, which points to an open circuit, a failed pump driver, or a wiring fault.

SystemPowertrain

Code typeGeneric (all makes)

SeverityHigh

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.