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P271C

Park Pawl Position Sensor B Circuit Low

The redundant park pawl position sensor B reads below the lower diagnostic threshold. Redundancy for the park-engagement check is lost.

  • Check engine light: Yes
  • Emissions related: No
  • Repair difficulty: hard

Common causes

Ordered by how often each turns out to be the cause.

  • Internal short in sensor elementCommon
  • Signal wire shorted to groundPossible
  • Connector pins corroded - high contact resistanceLess likely

Parts involved

  • Park Pawl Position Sensor B
  • Wiring Harness

P271C is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.