Dodge Challenger P0457: EVAP System – Leak Detected

P0457 This is an example of a common problem code for the Dodge Challenger. This is the code for a number you get when you plug in your Challenger to an OBDII scanner. The P0457 signifies that the Evaporative Emissions Control (EVAPS) system is leaking. Similar to P0455 for large leaks and P0456 for small leaks, it is also called P0457.

Your Challenger's driveability is generally not affected by P0457. Certainly anytime the service engine soon light is on though, it’s good to deal with it as soon as possible.

Dodge Challenger P0457 Definition

P0457 refers to a general OBDII trouble code. It means that no matter what make or model vehicle you have, this code will always mean the same (Challenger or otherwise). The code is technically:

System Leak – Evaporative Emission System

The EVAP captures any fuel vapor in the fuel tank. They are then sent to the engines intake for ignition. When there is a leak in the Dodge Challenger’s EVAP system, it will throw the P0457 OBDII Code.

Dodge Challenger P0457 OBDII Code Symptoms

A P0457 Code will not usually be associated with other noticeable symptoms. Smells like gas The service engine soon light.

Particular attention should be paid to the fuel tank or fuel filler tube smell.

The EVAP process deals with fuel vapors directly. If these vapors are leaking from the system, you’ll often smell them faintly while operating the vehicle. But, it won’t affect the way the engine itself runs. The EVAP technology deals only with the fuel vapor but not how the engine runs.

Challenger P0457 Trouble code Causes

P0457 can be triggered by many factors in your Dodge Challenger. If your Challenger has warned you at all in the last few months that the fuel cap was off when it wasn’t, then replacing it would be a great first step.

Below are the top most probable problems that could throw the code. These were listed alphabetically, in some order.

• Hose for Evap System– The hose that carries the fuel vapor from the fuel tank to the intake manifold can begin to leak. This can lead to the code P0457. It should have a hole or tear. This is the main problem that can cause the code.
• Vapor Canister Purge Valve– One of the most common causes of the P0457 code is the vapor canister purge valve. It’s really easy to replace. There are some clips you will need to look for and then remove.
• Fuel Tank Sending Unit– It is possible for the gasket that attaches the fuel sending unit to the gas tank to go bad. It can lower the tank pressure, which could throw out the code.
• Fuel Cap– A bad fuel cap can cause the code to be thrown for sure. Often, you’ll get a message informing you that the fuel cap is off even when it is on. It may be worth your time to get that message and a P0457 to ensure you don't waste any money.
• Fuel Filler Neck– There is often a gasket where the fuel filler neck connects with the gas tank. It is possible for this gasket to dry, particularly if vehicles spend a lot of time in dry environments. When it dries out, the fuel tank can’t hold pressure anymore.

Dodge Challenger Diagnosis - P0457

The mechanic will have a lot of different tools at his disposal in order to determine the cause of your Dodge Challenger P0457. These are some of the common diagnostics that can be done for the code

• A mechanic will often check to make sure there are no other codes. It is easier to diagnose problems if there are more codes. That’s because when they appear together in certain combinations, there will often only be only a few conditions that will throw any combination of codes at one time.
• The mechanic will normally determine what trouble codes are associated with P0457. Take a look at the EVAP system. It includes the purge valve and line as well as the canister.
• To ensure that the cap can withstand pressure, the mechanic will check it. If you are getting a warning that your gas cap is off, even when it’s on, replacing it will more than likely clear this code.
• Monitoring and checking the fuel tank pressure is a must.
• Following the inspections and repairs, the mechanic will conduct two more tests.
• A smoke test, and they’ll use a scan tool to confirm that the EVAP solenoids and valves are operating properly.

Here’s a pretty good video on diagnosing these leaks from Scotty Kilmer, if you are interested:

Most common P0457 fixes

These are some of the most popular Challenger P0457 fix:

• Replacing the gas cap
• Replacement for EVAP Line
• Replace charcoal canister
• Change the fuel tank

It is best to begin with the gas cap, and then work your way up to the fuel tanks. The gas cap is the most difficult and cost-effective item to replace.

Here’s a great video on How to check your gas cap.

You will need to solve the problem quickly. We trust this helped. Please feel free to add anything below.

Are P0457 Serious Concerns?

While P0457 is not going to cause the Challenger’s engine to stop running, it should not be treated lightly. Fuel leaks could be a problem. You should pay extra attention to the level of your fuel tank and ensure that you're not leaking fuel. It is best to have it checked and/or dealt with immediately.

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