P0053 OBD II Trouble Code HO2S Heater Resistance Bank 1 Sensor 1

Symptoms of P0053 OBD II Trouble Code

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

Common Causes of P0053 OBD II Trouble Code

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

Severity of P0053 OBD II Trouble Code

Since a P0053 code means that the upstream O2 sensor heater is basically inoperable, it should be addressed at your earliest convenience. Symptoms of a this engine code may include: