AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Mitsubishi - P0456 Mitsubishi

P0456 Mitsubishi Code - EVAP System Very Small Leak Detected

- Code Popularity: 47,025 Views
- Repair Importance Level: 1/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC P0456 Mitsubishi?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • 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
  • Evaporative Emission (EVAP) canister or fuel tank leaks
  • Evaporative Emission (EVAP) system hose leaking
  • Fuel tank leaking
⚠ Does your Mitsubishi have Safety Recalls? → Check here

How to Fix the DTC P0456 Mitsubishi?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Search for P0456 Mitsubishi Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0456 Mitsubishi code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

When is the Code Detected?

Evaporative Emission (EVAP) control system has a very small leak such as loose fuel filler cap.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • A noticeable fuel odor may result from fuel vapor release

Code P0456 Mitsubishi Description

This diagnosis detects leaks in the Evaporative Emission System (EVAP) purge line using engine intake manifold vacuum. If pressure does not increase, the Engine Control Module (ECM) will check for leaks in the line between the fuel tank and EVAP canister purge volume control solenoid valve under the following vacuum test condition.
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.
OBDII Code P0456 Mitsubishi - EVAP System Very Small Leak Detected - AutoCodes.com
P0456 Mitsubishi Code - EVAP System Very Small Leak Detected

Need More Information on the Code?

Need more information on how to fix the P0456 Mitsubishi code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0456 Mitsubishi code diagnosed by a professional: Find a repair shop in your area

Code P0456 Mitsubishi comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the P0456 Mitsubishi code? Have you replaced any parts?
Any information is appreciated. Thanks