how to troubleshoot a P0455 evap leak code in my Toyota Corolla E170 (2013-2019)

Learn how to troubleshoot and fix P0455 EVAP leak in Toyota Corolla E170 (2013-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Gas Cap

• Tools Required: None
• Steps:
  1. Remove the gas cap and inspect for visible damage.
  2. Replace the gas cap if damaged or if it fails to create a proper seal.

3. Check and Replace EVAP Hoses

• Tools Required: Pliers, hose clamp tool
• Steps:
  1. Locate the EVAP hoses connected to the EVAP canister and fuel tank.
  2. Inspect each hose for cracks or damage.
  3. If any hoses are damaged, remove them using pliers and replace them with new hoses, securing them with hose clamps.

4. Perform Smoke Test

• Tools Required: Smoke machine
• Steps:
  1. Connect the smoke machine to the EVAP service port.
  2. Activate the machine to introduce smoke into the system.
  3. Observe for smoke escaping from any leaks in the system, focusing on connections, hoses, and the charcoal canister.
  4. Repair or replace any components identified with leaks.

5. Test EVAP Purge and Vent Valves

• Tools Required: Multimeter
• Steps:
  1. Disconnect the electrical connectors from the purge and vent valves.
  2. Use a multimeter to test for continuity in each valve.
  3. Replace any valves that do not show continuity or proper operation.