P0391 OBD II Trouble Code Camshaft Position Sensor B Circuit Range/Performance Bank 2

Symptoms of P0391 OBD II Trouble Code

  • Malfunction Indicator Lamp (MIL) illumination (a.k.a. check engine light)
  • Lack of power
  • Possible no start condition
  • Stalling

Common Causes of P0391 OBD II Trouble Code

  • Faulty camshaft position sensor (CMP) "B"
  • Poor wiring connection at cam sensor "B"
  • Electrical short or open condition in associated wiring
  • Low/bad battery