P0450 OBD II Trouble Code Evaporative Emission Control System Pressure Sensor Malfunction

Symptoms of P0450 OBD II Trouble Code

  • In most cases, there will be no symptoms exhibited with a code P0450
  • Slightly diminished fuel efficiency
  • An illuminated MIL (malfunction indicator lamp)

Common Causes of P0450 OBD II Trouble Code

  • Faulty EVAP pressure sensor
  • Loose, defective, or missing fuel cap
  • Clogged fuel tank pressure relief valve
  • Broken, collapsed, burned, or otherwise damaged EVAP hoses/lines
  • Cracked or broken charcoal canister

Severity of P0450 OBD II Trouble Code

The code P0450 is associated with emissions regulation and will not seriously affect engine drivability. It should not be classified as severe.