P0169 OBD II Trouble Code Incorrect Fuel Composition

Symptoms of P0169 OBD II Trouble Code

  • Usually no symptoms accompany a code P0169
  • Other fuel composition codes may be present
  • MIL illumination will eventually occur

Common Causes of P0169 OBD II Trouble Code

  • Excessive fuel contamination
  • Defective fuel composition/temperature sensor
  • Open, shorted, or damaged wiring or connectors
  • PCM or a PCM programing error

Severity of P0169 OBD II Trouble Code

A stored code P0169 should be treated as severe because fuel composition is critical for calculating fuel delivery strategy in flex fuel vehicles. Contaminated fuel may also harm fuel delivery and internal engine components.