P0455 Mitsubishi Code - EVAP System Large Leak Detected
Quick Answer
This diagnosis detects leaks in the Evaporative Emission System (EVAP) purge line using engine intake manifold vacuum. Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- P0455 Mitsubishi indicates EVAP System Large Leak Detected.
- Common causes
- Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code P0455 Mitsubishi Description
The vacuum cut valve bypass valve is opened to clear the line between the fuel tank and the EVAP canister purge volume control solenoid valve. The EVAP canister vent control valve will then be closed to shut the EVAP purge line off. The EVAP canister purge volume control solenoid valve is opened to depressurize the EVAP purge line using intake manifold vacuum. After this depressurization is implemented, the EVAP canister purge volume control solenoid valve will be closed.
What are the Possible Causes of the DTC P0455 Mitsubishi?
- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking
How to Fix the DTC P0455 Mitsubishi?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0455 Mitsubishi code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0455 Mitsubishi Code
1. What does the OBDII code P0455 mean on a Mitsubishi?
P0455 indicates a "Large Leak Detected" in the EVAP (Evaporative Emission Control) system, meaning the system cannot properly contain fuel vapors.
2. What are the common symptoms of a P0455 code on a Mitsubishi?
Symptoms include the check engine light turning on, a possible fuel smell near the vehicle, and no noticeable change in performance in most cases.
3. What causes the P0455 code on a Mitsubishi?
Common causes include a loose or damaged gas cap, a cracked or disconnected EVAP hose, a faulty purge or vent valve, or a damaged charcoal canister.
4. Can a loose gas cap cause the P0455 code on a Mitsubishi?
Yes, a loose, missing, or damaged gas cap is one of the most common causes of the P0455 code.
5. How do I fix the P0455 code on my Mitsubishi?
Start by tightening or replacing the gas cap. If the issue persists, inspect EVAP hoses and components for damage or leaks and repair or replace faulty parts.
6. Is it safe to drive with a P0455 code on a Mitsubishi?
Yes, it is generally safe to drive, but the issue should be addressed promptly to prevent fuel vapor leaks and potential environmental harm.
7. How can I diagnose the P0455 code on a Mitsubishi myself?
Check the gas cap for proper fit, inspect EVAP hoses for cracks or disconnections, and look for visible damage to the EVAP system components.
8. Will clearing the code fix the P0455 issue on my Mitsubishi?
Clearing the code will turn off the check engine light temporarily, but the code will return if the underlying issue isn't resolved.
9. Can bad weather cause the P0455 code on a Mitsubishi?
Extreme weather conditions, such as heavy rain or freezing temperatures, can sometimes cause EVAP components to fail or hoses to loosen, triggering the code.
10. How much does it cost to fix a P0455 code on a Mitsubishi?
Repair costs vary depending on the cause. Replacing a gas cap might cost $10-$50, while fixing a damaged EVAP component could cost $150-$500 or more.
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