P271APark Pawl Position Sensor A Circuit Low
- Generic OBD-II code · Powertrain
- Can trigger limp mode
- How the car detects it
- With park-by-wire the pawl is moved by an actuator instead of a cable, and a position sensor tells the controller whether it is engaged. P271A means the signal of sensor A has dropped below its valid band. Ford's 2026 safety recall 26V688 shows a real case: on 2026-2027 Lincoln Nautilus Hybrid and 2027 Corsair Hybrid with the HF55 hybrid transmission, an unvalidated anti-rust oil inside the Integrated Park Module attacked the circuit board coating, the rotary sensor circuit corroded and its output voltage sank. Dealers found P271A. Owners saw a wrench lamp with Service Vehicle Soon or Shifting System Error, could not leave Park, or the car shifted to Neutral while moving. The fix is a new module with current software.
- What you may notice
- Vehicle cannot be shifted out of Park
- Unexpected shift to Neutral while driving
- Service warning such as Shifting System Error
- Likely causes
- LikelyCorrosion on the park module circuit board (Ford HF55, recall 26V688)
- PossibleSensor A signal wire shorted to ground
- PossibleMissing or low reference voltage to sensor A
- RareFailed position sensor A
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €150 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.