P0186 OBD II Trouble Code Fuel Temperature Sensor B Circuit Range Performance

Symptoms of P0186 OBD II Trouble Code

  • There may be no symptoms
  • Other fuel composition codes may be present
  • Possibly MIL illumination

Common Causes of P0186 OBD II Trouble Code

  • A bad ambient temperature sensor B
  • Defective fuel temperature/composition sensor
  • Faulty intake air temperature sensor
  • Open, shorted, or damaged wiring or connectors
  • PCM or a PCM programing error

Severity of P0186 OBD II Trouble Code

Fuel temperature is monitored by the PCM to calculate fuel delivery strategy (in flex fuel vehicles) so this code should be treated as severe.