how to fix P0455 code in my Genesis G70 IG (2017-2023)

Learn how to diagnose and fix P0455 code related to EVAP system leaks in Genesis G70 (2017-2023). Step-by-step guide with tools and parts needed.

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace the Gas Cap

• Tools Required: None specifically; just hands.
• Remove the gas cap and inspect the rubber seal for damage.
• If damaged, replace the gas cap with a new OEM or equivalent part.
• Reinstall the gas cap securely and reconnect the battery.

3. Inspect and Repair EVAP Hoses

• Tools Required: Pliers, socket set.
• Visually inspect the EVAP hoses for any cracks or loose connections.
• If any hoses are damaged, remove the old hoses using pliers and replace them with new ones.
• Tighten all connections securely to prevent leaks.

4. Test and Replace EVAP Solenoids (if necessary)

• Tools Required: Multimeter, socket set.
• Locate the EVAP purge solenoid and vent solenoid (refer to service manual for locations).
• Disconnect the electrical connectors and test the solenoids with a multimeter for continuity.
• If a solenoid is faulty, remove it using a socket set and replace it with a new one.
• Reconnect the electrical connectors and ensure proper seating.

5. Perform a Smoke Test

• Tools Required: Smoke machine (or DIY smoke source).
• Connect the smoke machine to the EVAP system at the service port.
• Observe for smoke escaping from any areas, which indicates a leak.
• Repair any identified leaks and ensure all components are sealed properly.