The P0455 trouble code pertains to the Evaporative Emission Control System Leak Detected (gross leak). This indicates a significant leak in the vehicle’s evaporative emission control system, allowing the escape of fuel vapors into the atmosphere.
Evaporative Emission Control System Leak Detected (Gross Leak)
Code symptoms P0455.
1. Illuminated “Check Engine” or “Service Engine Soon” light on the dashboard.
2. Smell of fuel around the vehicle.
3. Noticeable decrease in fuel efficiency.
4. Hissing sound coming from the fuel tank area.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0455.
1. Loose or damaged fuel cap.
2. Cracked or damaged hoses or tubes in the evaporative emission control system.
3. Malfunctioning purge valve.
4. Defective charcoal canister.
5. Faulty fuel tank pressure sensor.
6. Corrosion or damage to system components.
Code Solutions P0455.
1. Check the fuel cap for proper sealing and tighten or replace if loose or damaged.
2. Inspect hoses and tubes in the evaporative emission control system for cracks, leaks, or damage, and replace as needed.
3. Test and replace the purge valve if it’s not functioning correctly.
4. Evaluate the condition of the charcoal canister and replace if defective.
5. Test the fuel tank pressure sensor for proper operation and replace if faulty.
6. Inspect all system components for corrosion or damage and repair or replace as necessary.