P0691 OBD II Trouble Code Cooling Fan 1 Relay Control Circuit Low

Symptoms of P0691 OBD II Trouble Code

  • Engine overheating
  • Check engine light on

Common Causes of P0691 OBD II Trouble Code

  • Faulty cooling fan relay 1
  • Blown cooling fan 1 fuse
  • Faulty PCM (rarely)

Severity of P0691 OBD II Trouble Code

Symptoms of a P0691 code may include: