What does code P2AD9 mean?

Q: What does code P2AD9 mean?

Reductant Pump Motor Position Sensor Circuit High. P2AD9 indicates that the reductant pump motor position sensor circuit is reporting a voltage above the expected range, which the engine control module interprets as a fault in the feedback signal from the pump motor's position sensor. This sensor is part of the diesel exhaust fluid (DEF) dosing system, and a high signal typically means the circuit is open, shorted to voltage, or the sensor itself has failed.

DTC codes / P2Axx · Hybrid propulsion / P2AD9

P2AD9Reductant Pump Motor Position Sensor Circuit High

P2AD9 indicates that the reductant pump motor position sensor circuit is reporting a voltage above the expected range, which the engine control module interprets as a fault in the feedback signal from the pump motor's position sensor. This sensor is part of the diesel exhaust fluid (DEF) dosing system, and a high signal typically means the circuit is open, shorted to voltage, or the sensor itself has failed.

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.