P0177 OBD II Trouble Code Fuel Composition Sensor Circuit Range/Performance

Symptoms of P0177 OBD II Trouble Code

  • Check engine light on
  • Lack of Power
  • Poor fuel economy
  • Possible stalling at stops

Common Causes of P0177 OBD II Trouble Code

  • Aftermarket equipment
  • Faulty secondary ignition components
  • Faulty FFS
  • Faulty PCM (rare)

Severity of P0177 OBD II Trouble Code

Symptoms of a P0177 code may include: