Troubleshooting Fault Code P0458 Caused by Faulty Purge Control Valve
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Evaporative Emission Control System (EVAP) is a pollution control system that prevents gasoline vapor from venting into the atmosphere. This guide provides instructions on determining if a purge control valve is faulty and replacing your Mitsubishi Outlander’s purge control valve.
At a Glance
- Code: P0458, EVAP purge control valve circuit low
- Vehicle shown: Mitsubishi Outlander
- Usual cause: A failed purge control valve or its wiring and connector
- Tools: T25 Torx L shaped driver and a scan tool to clear the code
- Time: About 30 minutes
EVAP System consists of:
- Fuel Tank, Gas Cap
- Liquid-Vapor Separator
- EVAP Canister
- Purge Valve/Sensor
- Vent Hoses
- Fuel Tank Pressure Sensor.
Symptoms
- Illumination of Check Engine Light or MIL.
- Error code P0458.
- A fuel smell is possible but uncommon with this code; P0458 is usually an electrical fault
What you will need
Parts
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Featured in The Wall Street Journal
- Mitsubishi purge control valve
Tools
- YOUCANIC UCAN-II Pro
- T-25 L-shape screwdriver
Procedure
- If you are experiencing error code P0458 on a Mitsubishi, the engine control module (ECM) has detected a malfunction with the purge control valve or its control circuit. Most commonly, it’s a purge valve problem.
- Find the location of the purge control valve.
- Remove two hoses that are connected to the purge valve.
- Remove the electrical connector from the purge valve.
- Using a T-25 L-shape screwdriver, remove the two (2) screws that connect the purge control valve to its bracket.
- Prepare the new purge control valve.
- Assemble in reverse order.
- Start the engine and observe if the check engine light (CEL or MIL) will Illuminate.
- If MIL does not illuminate, then you are done. The check engine light may take up to two days to reset. Otherwise, there could be a problem with the purge valve wiring, the canister, or the filler cap.
Gasoline or gasoline used to propel our vehicles consists of various chemicals such as benzene, which, when inhaled, pose various health issues. To solve this problem, the government has mandated that every car manufacturer feed the gasoline vapor from the vehicle tank to the engine for combustion disposal.
Troubleshooting with YOUCANIC UCAN-II Pro
One good example of a multi-system scanner is the YOUCANIC Full Systems Scanner. This scanner can read and clear fault codes from all the systems in your Mitsubishi Outlander. It can also perform bi-directional tests, maintenance and repair resets, etc.
Vehicle Application
- 2007 to 2017 Mitsubishi Lancer/Galant Fortis
- 2007 to 2012 Peugeot 4007
- 2012 to 2017 Peugeot 4008
- 2009 Mitsubishi Outlander (Facelift Europe)
- 2012 Mitsubishi Outlander Sport
- 2013 Mitsubishi Outlander PHEV
- 2010 Mitsubishi ASX, Mitsubishi RVR (Canada)
- 2010 to 2015 Proton Inspira
- 2007-now Mitsubishi Delica
- 2018-now Mitsubishi Eclipse Cross
More on P0458
P0458 means the purge valve circuit voltage is low, so it is an electrical problem with the valve or its wiring rather than an EVAP leak. For a deeper look at causes and testing, see our Mitsubishi P0458 diagnosis guide.
Check these troubleshooting and repair guides for more help on your vehicle.
Frequently Asked Questions
How long can you drive with an EVAP leak?
Is it Safe to Drive with an EVAP Leak? Technically, nothing is stopping you from driving with a leak. However, it’s never wise to travel while gas fumes infiltrate the cabin or the atmosphere around the car.
What causes EVAP to fail?
The most common causes for EVAP leaks include bad seals and O-rings, a failing purge valve, a damaged hose or vent, or defective leak detection sensors.
Does an EVAP leak affect gas mileage?
When a canister purge valve doesn’t open as it should, your gas mileage might be negatively affected. This is because the vapors in your car used in combustion will go to the EVAP canister and then get vented out into the environment, causing you to use some of the fuel that your car would usually use for burning.
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