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P055A

Engine Oil Pressure Sensor or Switch B Circuit

Engine Oil Pressure Sensor or Switch B Circuit: an electrical fault is present in the circuit.

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

Common causes

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

  • Open in sensor or wiringCommon

Parts involved

  • Oil Pressure Sensor B

P055A 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.