P01F3 Atención pronto

O2 Sensor Circuit High Voltage Bank 1 Sensor 4

Powertrain

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Descripción

This code indicates that the oxygen sensor circuit for Bank 1, Sensor 4 is reporting a high voltage. This often points to a problem with the sensor itself or its electrical connections.

Causas comunes

  • Faulty oxygen sensor (Sensor 4)
  • Wiring issue causing high voltage (short to power)
  • Problem with the sensor's heating element
  • Contaminated oxygen sensor
  • Internal sensor fault

Síntomas

  • Reduced fuel efficiency
  • Increased emissions
  • Check Engine Light illuminated
  • Rough engine idle

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