OBD-II code · Powertrain (generic, extended)
P2AD8 Reductant Pump Motor Position Sensor Circuit Low
Voltage on the reductant pump motor position sensor signal line is below the expected window. Wire shorted to ground or sensor short.
Is it safe to drive with P2AD8?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySignal wire shorted to ground
- PossibleInternal sensor short
- Less likelyConnector pins corroded - high contact resistance
Symptoms
- Check engine light or NOx warning on
- AdBlue/DEF level or quality warning
- Possible no-start countdown after ignore period
- Failed emissions inspection (NOx)
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Likely to fail
- Parts involved
- Reductant Pump Motor Position Sensor, Wiring Harness, Scr Module
Related codes
- P2AD5Intermediate System Voltage High
- P2AD6Reductant Pump Motor Position Sensor Circuit
- P2AD7Reductant Pump Motor Position Sensor Range/Performance
- P2AD9Reductant Pump Motor Position Sensor Circuit High
- P2ADAReductant Tank Temperature Sensor B Range/Performance
- P2ADBReductant Tank Temperature Sensor B Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.