Ford Transit Connect P0449: Vent Valve Solenoid - Circuit Malfunction

P0449 Ford Transit Connect

This is a common problem with the Ford Transit Connect Is the Code P0449. This is the code that refers to a number given when you connect your Transit Connect to an OBD2 scanner. The evaporative emission control (EVAP), system is covered by P0449. This code is often found with or related to P0446 and P0420.

P0449: EVAP System – Vent Valve Solenoid – Circuit Malfunction

Normally, P0449 does not pose a danger to your Transit Connect's ability to drive. Certainly anytime the service engine soon light is on, it’s good to deal with it as soon as possible though. A scanner that is very accurate will allow you to identify if the valve works correctly. Most shops carry them. There’s a link towards the bottom the page on exactly how to perform a quality diagnosis with a scan tool.


Índice de Contenido
  1. Ford Transit Connect P0449 Definition
  2. Ford Transit Connect OBDII Code Symptoms
  3. Transit Connect P0449 Trouble code Causes
  4. Ford Transit Connect - P0449 Diagnostics
  5. The most common P0449 fixes
  6. Are P0449 Serious Concerns?

Ford Transit Connect P0449 Definition

P0449 stands for a universal OBDII Trouble Code. This code can be used to indicate the same message regardless of the make and model of the vehicle (Transit Connect, or not), as long it was made after 1996.

If P0449 is displayed, it means that either the solenoid circuit or the valve controlling the evaporation system are not working correctly. Depending on your vehicle's model, the EVAP cycle fuel vapor out of the tank into an intake manifold. If the system fails to function properly, fuel vapor will not be removed.

ECM (Engine Control module) has identified a problem in the circuit that controls the vent which releases fuel vapor. Soon, the service engine will follow this up.


Ford Transit Connect OBDII Code Symptoms

P0449 OBDII Code Diagnosis Ford Transit Connect
The P0449 code is usually triggered by the service engine soon lamp.

A P0449 Code will not usually be associated with other noticeable symptoms. The smell of gas The service engine soon light. The slightest drop in fuel economy may also be noticeable.

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

The EVAP system is responsible for fuel vapors. If these vapors are leaking from the system, you’ll often smell them faintly while operating the vehicle.


Transit Connect P0449 Trouble code Causes

P0449 can be triggered in Ford Transit Connect by many factors. These are some of the more common issues that can trigger the P0449 code. Here's a video explaining the process.

  • 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 P0449. This will save you time and money.
  • EVAP Hose– The hose that carries the fuel vapor from the fuel tank to the intake manifold can begin to leak. This can lead to the P0449 error code. It should have a tear or a hole. This is one of most frequent causes for the code.
  • Vapor Canister Purge Valve– One of the most common causes of the P0449 code is the vapor canister purge valve. It’s really easy to replace. You will need to locate and take out a few clips. Here’s How to test a purge valle (YouTube).
  • Trouble with Fuse/Wiring– If the wiring going to the valve has been compromise, it’ll lead to the P0449.
  • 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 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, it may erroneously throw P0449.


Ford Transit Connect - P0449 Diagnostics

The mechanic will have a lot of different tools at their disposal in order to determine the cause of your Ford Transit Connect P0449. The most commonly used methods to identify the code are:

  • 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.
  • Most mechanics will check for any additional trouble 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.
  • Once the mechanic has determined the trouble codes associated with P0449, he or she will usually Check out the EVAP System. These include the line and purge valve.
  • Monitor and check the pressure in your fuel tank.
  • After for the checks and fixes listed above, the mechanic will perform two tests: A smoke test, and they’ll use a scan tool to confirm that the EVAP solenoids and valves are operating properly.

Have you got trouble with your computer? Here’s a Super technical video It is very detailed in diagnosing P0449.


The most common P0449 fixes

P0449 Code Fix Ford Transit Connect

Below are the most commonly used Transit Connect P0449 Fixes:

  • Replacing the gas cap
  • Replacing EVAP lines
  • Vent valve replacement
  • Wiring repair

You should start with the gas caps and move on to the fuel tanks. This is because the gas caps are the most cost-effective and easiest to replace.

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

You will need to solve the problem that caused your Ford Transit Connect's P0449 error code. We trust this helped. Please feel free to add anything below.


Are P0449 Serious Concerns?

While P0449 is not going to cause the Transit Connect’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. You should immediately take it in for repair or replacement.


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