P2AD9Reductant Pump Motor Position Sensor Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2AD9 is the high-side fault: the pump motor position signal stays above its permitted range. An open signal line pulled up by the controller's internal resistor, a broken sensor ground or a short to the supply rail produce this picture. Without changing position information, speed control fails and the pressure build-up may be aborted; faults of the pump drive itself carry their own codes, in Ford's diesel summary for example P208A to P208D. No public document describes P2AD9 itself or its limit. Look for white DEF residue in the pump connector, since the fluid creeps along wires and attacks terminals, and check the ground connection before condemning the pump. A failure that stops dosing triggers the driver warning and, if ignored, the speed or restart restrictions of the SCR system.
- What you may notice
- Check engine light and SCR warning
- No DEF pressure build-up, dosing stops
- Likely causes
- LikelyOpen signal line or broken sensor ground
- PossibleDEF residue corroding the pump connector
- RareSignal shorted to the supply rail
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €100 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.