P1255 — Volkswagen — Coolant-temperature sensor G62: circuit short to ground

P1255 flags an electrical fault in the G62 coolant-temperature circuit.

Meaning, symptoms, causes and checks

P1255 flags an electrical fault in the G62 coolant-temperature circuit. The reported sensor value must be distinguished from actual engine temperature.

Affected system: Engine temperature

Symptoms

  • Difficult starting, uneven idle or abnormal temperature readings.

Possible causes

  • Faulty wiring, connections or G62 sensor.

What to check

  • Inspect connections and test the circuit and sensor against the service manual.