OBD-II code · Powertrain (generic, extended)
P2AD7 Reductant Pump Motor Position Sensor Range/Performance
The reductant pump motor position signal does not match plausibility checks against related signals. Sensor drift.
Is it safe to drive with P2AD7?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySensor characteristic drifted
- PossibleSensor mounting displaced from reference path
- Less likelySensor element aged beyond calibration window
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
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.