P271BPark Pawl Position Sensor A Circuit High
- Generic OBD-II code · Powertrain
- Can trigger limp mode
- How the car detects it
- P271B is the upper-limit partner of P271A: the signal from park pawl position sensor A reads above its plausible range. Typical electrical causes are a broken ground or signal wire, which lets the input float towards the reference, or a short to a supply line. No manufacturer documents P271B publicly. The closest published case concerns the same sensor at its lower limit, Ford's recall 26V688 for the Integrated Park Module of the HF55 hybrid transmission, which shows what is at stake: if the controller cannot trust the pawl position it may refuse to leave Park or drop to Neutral. Most systems carry a second sensor B as a cross-check (P271C/P271D), so a single high reading is normally caught before the pawl moves unintentionally.
- What you may notice
- Shift system warning on the display
- Park cannot be selected or released
- Likely causes
- LikelyOpen sensor ground or signal wire
- PossibleSignal wire shorted to reference or battery voltage
- PossibleCorroded or loose connector at the park actuator
- RareFailed position sensor A
- Repair
- Workshop only · 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.