What does code P2BD5 mean?

Q: What does code P2BD5 mean?

Motor Electronics Coolant Pump C Control Circuit Low. P2BD5 indicates that the engine control module (ECM) has detected a low-voltage condition on the control circuit for the motor electronics coolant pump 'C'. This pump is typically an auxiliary electric pump used to circulate coolant through the turbocharger, EGR cooler, or battery pack, and the ECM commands it via a pulse-width-modulated (PWM) signal or a simple low-side driver. The code sets when the voltage on the control wire falls below the expected threshold, suggesting a short to ground, an open circuit, or a faulty pump.

DTC codes / P2Bxx · Hybrid propulsion / P2BD5

P2BD5Motor Electronics Coolant Pump C Control Circuit Low

P2BD5 indicates that the engine control module (ECM) has detected a low-voltage condition on the control circuit for the motor electronics coolant pump 'C'. This pump is typically an auxiliary electric pump used to circulate coolant through the turbocharger, EGR cooler, or battery pack, and the ECM commands it via a pulse-width-modulated (PWM) signal or a simple low-side driver. The code sets when the voltage on the control wire falls below the expected threshold, suggesting a short to ground, an open circuit, or a faulty pump.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.