how to fix the P0455 code on my Tesla Outback 5th Generation (2015-2019)

Learn how to diagnose and fix P0455 fuel system leak in Subaru Outback (2015-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Tools Required: OBD-II scanner, basic hand tools (socket set, screwdrivers), smoke machine or pressure tester, safety glasses, gloves.
• Ensure the vehicle is parked on a level surface and the engine is off.

2. Inspect and Replace Gas Cap

• Sub-steps:
  • Remove the gas cap and inspect the rubber O-ring for wear or damage.
  • If damaged, replace the gas cap with a new OEM or quality aftermarket part.
  • Reinstall the gas cap and ensure it clicks securely into place.

3. Inspect EVAP Hoses

• Sub-steps:
  • Locate the EVAP hoses connected to the charcoal canister and purge valve.
  • Check for any visible cracks or signs of wear.
  • If any hose is damaged, disconnect it and replace it with a new one, ensuring proper routing and securing with clamps as needed.

4. Test the Purge Valve

• Sub-steps:
  • Locate the purge valve, typically near the intake manifold.
  • Disconnect the electrical connector and use a multimeter to check for continuity.
  • If the valve is faulty, remove it and replace it with a new one, ensuring it is oriented correctly.

5. Perform Leak Test

• Sub-steps:
  • Connect a smoke machine or pressure tester to the EVAP system.
  • Activate the device to introduce smoke or pressure into the system.
  • Monitor for any smoke leaks; if detected, identify the source and make necessary repairs or replacements.