P271CPark Pawl Position Sensor B Circuit Low
- Generic OBD-II code · Powertrain
- Can trigger limp mode
- How the car detects it
- P271C covers the second park pawl position sensor, B, whose signal has fallen below the valid range. Park-by-wire designs often fit two position signals so that a single faulty reading cannot release or engage the pawl by itself; sensor B is the backup or comparison channel to sensor A. A low reading points to a short to ground, a missing reference voltage or a sensor that has failed low. No manufacturer documents P271C publicly; the only published field case in this family is Ford's recall 26V688, which concerns sensor A in the park module of the HF55 hybrid gearbox. With one channel lost the controller usually still knows the pawl state from the other, but it will warn the driver and may limit shifting into or out of Park.
- What you may notice
- Shift system warning, vehicle usually still drivable
- Delayed or refused Park engagement
- Likely causes
- LikelySensor B signal wire shorted to ground
- PossibleReference voltage to sensor B missing or low
- PossibleCorrosion inside the park actuator module
- RareFailed position sensor B
- 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.