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P0457 Mitsubishi Code - EVAP Control System Leak Detected Fuel Filler Cap Loose/Off

Quick Answer

The P0457 code for Mitsubishi vehicles indicates that the EVAP (Evaporative Emission Control) system has detected a leak, specifically from the fuel filler cap being loose or off. Common causes include Loose or missing fuel filler cap, Damaged or deteriorated fuel filler cap seal, EVAP system hose or component leak. 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
P0457 Mitsubishi indicates EVAP Control System Leak Detected Fuel Filler Cap Loose/Off.
Common causes
Common causes include Loose or missing fuel filler cap, Damaged or deteriorated fuel filler cap seal, EVAP system hose or component leak.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P0457 Mitsubishi Description

The P0457 code for Mitsubishi vehicles indicates that the EVAP (Evaporative Emission Control) system has detected a leak, specifically from the fuel filler cap being loose or off. The EVAP system is responsible for capturing and storing fuel vapors from the fuel tank to prevent them from escaping into the atmosphere. When the system detects a leak, it triggers the check engine light and stores the P0457 code in the vehicle's computer system.

OBDII Code P0457 Mitsubishi - EVAP Control System Leak Detected Fuel Filler Cap Loose/Off
P0457 Mitsubishi Code - EVAP Control System Leak Detected Fuel Filler Cap Loose/Off

Common Causes of P0457 Mitsubishi

  1. Loose or missing fuel filler cap
  2. Damaged or deteriorated fuel filler cap seal
  3. EVAP system hose or component leak
  4. Faulty EVAP system pressure sensor
  5. EVAP system purge valve malfunction

Symptoms of P0457 Mitsubishi

  1. Check engine light illuminated
  2. Strong fuel odor near the fuel filler area
  3. Decreased fuel efficiency
  4. Rough idling or stalling
  5. Failed emissions test

How to Fix P0457 Mitsubishi

  1. Check the fuel filler cap: Ensure that the fuel filler cap is securely tightened or replace it if it is missing or damaged.
  2. Inspect the fuel filler cap seal: Check for any signs of wear or damage on the seal and replace it if necessary.
  3. Check EVAP system components: Inspect all hoses and components of the EVAP system for any leaks or damage and repair or replace as needed.
  4. Test EVAP system pressure sensor: Use a diagnostic tool to test the EVAP system pressure sensor for proper operation and replace if faulty.
  5. Test EVAP system purge valve: Check the EVAP system purge valve for proper functioning and replace if it is not working correctly.

Cost to Fix P0457 Mitsubishi

The typical repair cost for resolving a P0457 code related to a loose or missing fuel filler cap on a Mitsubishi vehicle can range from $50 to $200, depending on the specific cause of the issue and any parts that need to be replaced. This cost estimate includes parts and labor. However, it's essential to keep in mind that the actual diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's recommended to check with local auto repair shops for a more accurate estimate.

What does this mean?

Tech Notes for P0457 Mitsubishi

Check for a loose, missing or damage fuel filler the cap.

When is the Code Detected?

EVAP control system has a very large leak such as fuel filler cap fell off

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0457 Mitsubishi Code

1. What does OBDII code P0457 in a Mitsubishi mean?

Code P0457 indicates that the vehicle's onboard diagnostics system has detected a leak in the EVAP control system due to a loose or missing fuel filler cap.

2. What are the common symptoms of a P0457 code in a Mitsubishi?

Common symptoms of a P0457 code include the check engine light illuminating on the dashboard and potential fuel odor near the vehicle.

3. What are the possible causes of a P0457 code in a Mitsubishi?

The most common cause of a P0457 code in a Mitsubishi is a loose, improperly installed, or missing fuel filler cap. Other causes may include a damaged EVAP system component or a leak elsewhere in the system.

4. How serious is a P0457 code in a Mitsubishi?

While a P0457 code is not an immediate cause for concern in terms of vehicle safety, it can negatively impact fuel economy and emissions if left unresolved.

5. How can I diagnose a P0457 code in my Mitsubishi?

Diagnosing a P0457 code typically involves checking the fuel filler cap for proper installation and condition, inspecting the EVAP system components for damage or leaks, and using a scan tool to reset the code for further monitoring.

6. How do I repair a P0457 code in my Mitsubishi?

To repair a P0457 code, start by checking and tightening or replacing the fuel filler cap if necessary. If the issue persists, further inspection of the EVAP system components may be needed to identify and address any leaks or damage.

7. Can I drive my Mitsubishi with a P0457 code?

It is generally safe to drive your Mitsubishi with a P0457 code, but it is recommended to address the issue promptly to prevent potential fuel economy and emissions problems.

8. How long does it take to fix a P0457 code in a Mitsubishi?

The time needed to fix a P0457 code can vary depending on the cause of the issue. In many cases, resolving the code by tightening or replacing the fuel filler cap can be done quickly, while further diagnosis and repairs may take longer.

9. Will a P0457 code reset itself in a Mitsubishi?

If the underlying issue causing the P0457 code is resolved, the code may reset itself after a certain number of drive cycles. However, using a scan tool to clear the code manually is often recommended to ensure proper diagnosis and monitoring.

10. Can a loose gas cap cause a P0457 code in a Mitsubishi?

Yes, a loose, improperly installed, or missing fuel filler cap is a common cause of a P0457 code in a Mitsubishi. Ensuring the gas cap is tightened properly or replaced if damaged can often resolve the issue.

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