What does code P26D3 mean?

Q: What does code P26D3 mean?

Engine Coolant Pump Supply Voltage Circuit. P26D3 indicates that the engine control module (ECM) has detected an abnormal voltage condition on the electrical supply circuit for the engine coolant pump. The ECM monitors the voltage on the pump's power feed and sets this code when the signal falls outside the expected range, typically indicating an open circuit, short to ground, or short to power.

DTC codes / P26xx · Computer and output circuits / P26D3

P26D3Engine Coolant Pump Supply Voltage Circuit

P26D3 indicates that the engine control module (ECM) has detected an abnormal voltage condition on the electrical supply circuit for the engine coolant pump. The ECM monitors the voltage on the pump's power feed and sets this code when the signal falls outside the expected range, typically indicating an open circuit, short to ground, or short to power.

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.