Powertrain
generic / SAE
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.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberA / D8
Possible causes
- Signal wire shorted to ground high
- Internal sensor short medium
- Connector pins corroded - high contact resistance low
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)
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 200–1000 €
- Estimated time: 1–4 h
- Component: reductant pump motor position sensor
- Component: wiring harness
- Component: scr module
- MIL / check engine light
- emissions-relevant
- limp mode possible
Sources
References
sae:J2012