What does code P2AD8 mean?

Q: What does code P2AD8 mean?

Reductant Pump Motor Position Sensor Circuit Low. P2AD8 indicates that the reductant pump motor position sensor circuit is reporting a voltage below the expected range, which the control module interprets as a short to ground or an open sensor signal. The reductant pump is part of the diesel exhaust fluid (DEF) dosing system, and its position sensor tells the pump control module how far the pump motor has rotated; a low signal means the module cannot reliably command or verify pump movement.

DTC codes / P2Axx · Hybrid propulsion / P2AD8

P2AD8Reductant Pump Motor Position Sensor Circuit Low

P2AD8 indicates that the reductant pump motor position sensor circuit is reporting a voltage below the expected range, which the control module interprets as a short to ground or an open sensor signal. The reductant pump is part of the diesel exhaust fluid (DEF) dosing system, and its position sensor tells the pump control module how far the pump motor has rotated; a low signal means the module cannot reliably command or verify pump movement.

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.