P0055 OBD II Trouble Code HO2S Heater Resistance Bank 1 Sensor 3

Symptoms of P0055 OBD II Trouble Code

  • Delayed start up due to a lean cold start condition
  • Diminished fuel efficiency
  • Black smoke from exhaust due to a rich cold start condition
  • Other related diagnostic trouble codes may also be stored

Common Causes of P0055 OBD II Trouble Code

  • Burnt, broken, or disconnected wiring and/or connectors
  • A faulty O2 sensor
  • Blown fuse or burnt fusible link
  • Defective engine control relay

Severity of P0055 OBD II Trouble Code

When a code P0055 is stored, it should be considered severe because it means that the upstream O2 sensor heater is inoperable. Symptoms of a this engine code may include: