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

• •Check engine light illuminated
• •Fuel odor near the vehicle
• •Decreased fuel efficiency
• •Difficulty filling the fuel tank (fuel backflow)
• •Emissions test failure

1. 1Scan for error codes using an OBD-II scanner to confirm the P0455 code and check for any related codes.
2. 2Inspect the gas cap for damage or improper sealing and ensure it is tightened correctly.
3. 3Visually inspect the EVAP system for damaged hoses, loose connections, or cracked components.
4. 4Perform a smoke test on the EVAP system to identify any leaks.
5. 5Check the purge valve for proper operation by applying voltage to it and observing if it opens.
6. 6Test the fuel tank pressure sensor using a multimeter to ensure it is functioning within specifications.

After completing the repair, verify that the issue has been resolved:

• ✓Test the affected component to ensure it functions correctly
• ✓Check for any error codes or warning lights
• ✓Monitor the vehicle for a few days to ensure the issue does not recur

To prevent this issue from occurring again:

• •Follow the manufacturer's recommended maintenance schedule
• •Address warning signs early before they develop into major issues
• •Use quality parts and fluids recommended for your vehicle
• •Keep detailed records of all repairs and maintenance

• •OBD-II scanner
• •Smoke machine
• •Multimeter
• •Socket set
• •Screwdrivers

• •New gas cap (if faulty)
• •EVAP hoses (if damaged)
• •Purge valve (if faulty)
• •Fuel tank pressure sensor (if faulty)