Chrysler Town and Country P0456: EVAP System – Small Leak

This is one of the most commonly encountered trouble codes for the Chrysler Town and Country Is the Code P0456. This is a trouble code that refers to the number that you receive when you input your Town and Country into an a OBDII scanner. A P0456 code indicates that there may be a slight leakage in the evaporative exhaust control system. This code is often found with or related to P0420,P0441 and, very rarely, P0440.

Normally, P0456 does not pose a danger to the driving ability of your Town and Country. Certainly anytime the service engine soon light is on, it’s good to deal with it as soon as possible.

While the trouble code may state that there is a “small leak” in the EVAP system of your Chrysler Town and Country, it is actually referring to the amount of pressure lost, and not the physical size of the leak. This can happen in very small amounts.

Chrysler Town and Country, P0456 Definition

P0456 stands for a universal OBDII code. It means that no matter what make or model vehicle you have, this code can be used to indicate the same thing: Town and Country. The code is technically:

Software Leakage in the Smallest Detail – Evaporative Emission System

The EVAP system collects fuel vapor from your fuel tank. It then sends it to the intake of the engine to ignite the regular combustion process. When there is a small leak in the Chrysler Town and Country’s EVAP system, it will throw the P0456 OBDII Code. If there is a large leak, it’ll throw P0455.

Chrysler Town and Country OBDII code Symptoms

The P0456 code is usually not accompanied with any other symptoms than those listed. The smell of gas The service engine soon light.

The fuel tank and fuel filler tubes should smell particularly strong.

Fuel vapors are dealt with directly by the EVAP. 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. It does not impact the operation of the engine within your town or country.

Problem Codes for Town and Country: P0456

P0456 Trouble code can occur for many reasons in your Chrysler Town and Country. If your Town and Country 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 off your code. These were listed alphabetically, in decreasing order of likelihood.

• Evap Hose– The hose that carries the fuel vapor from the fuel tank to the intake manifold can begin to leak. The P0456 error code will be generated. You should look for a hole or a tear in the code. This is the leading cause of code.
• Vapor Canister Purge Valve– One of the most common causes of the P0456 code is the vapor canister purge valve. It’s really easy to replace. You will need to locate and take out a few clips.
• 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. You may not get the message but a P0456. This will save you time and money.
• Fuel Filler Neck– There is often a gasket where the fuel filler neck connects with the gas tank. The gasket may dry out especially if the vehicle is in dry conditions. When it dries out, the fuel tank can’t hold pressure anymore.

Chrysler Town and Country Diagnosis - P0456

To diagnose the problem with your Chrysler Town and Country, a mechanic can use a variety of tools. These are some of the common diagnostics that can be done for the code

• The mechanic will usually check for any additional trouble codes. A mechanic will usually check for additional trouble codes to help diagnose the problem. 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 P0456. Check out 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.
• Monitor and check the pressure in your fuel tank.
• The mechanic will then perform the following tests after completing the above-mentioned checks:
• 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 P0456 fixes

These are some of the most popular Town and Country P0456 fix:

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

You should start with the gas caps and move on to the fuel tanks. This is because the gas caps are the easiest to replace and the least costly.

Here’s a great video on How to test your gas tank.

You will need to find the cause of your Chrysler Town and Country throwing the P0456 code. We trust this helped. You can add any additional information by leaving a comment.

Do you consider P0456 to be a serious concern?

While P0456 is not going to cause the Town and Country’s engine to stop running, it should not be treated lightly. Fuel leaks could be a problem. Check your tank regularly to make sure there is no fuel leaking. It is best to have it checked and/or dealt with immediately.

Please leave comments below if you have any suggestions. Thanks!