What does code P261D mean?

Q: What does code P261D mean?

Coolant Pump B Control Circuit High. P261D indicates that the engine control module (ECM) has detected an abnormally high voltage on the control circuit for coolant pump B, which is often an auxiliary or secondary electric pump used for charge cooling or cabin heating. The ECM expects a specific voltage range on the circuit and sets this code when the signal exceeds the upper threshold, typically indicating an open circuit, short to power, or a faulty pump.

DTC codes / P26xx · Computer and output circuits / P261D

P261DCoolant Pump B Control Circuit High

P261D indicates that the engine control module (ECM) has detected an abnormally high voltage on the control circuit for coolant pump B, which is often an auxiliary or secondary electric pump used for charge cooling or cabin heating. The ECM expects a specific voltage range on the circuit and sets this code when the signal exceeds the upper threshold, typically indicating an open circuit, short to power, or a faulty pump.

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.