Chrysler Town and Country P0451: EVAP Pressure Sensor → Range/Performance

As with all OBD-II Trouble Codes, P0451 It is the same for all cars.  This means your vehicle is able to be identified by the symbol. Chrysler Town and Country‘s EVAP system has a pressure sensor that is malfunctioning in some way. 

A bad EVAP sensor, a clogged tank relief valve or fuel lines can cause P0451.  Other causes can also be involved.  We’ll cover those directly below.

P0451 is usually caused by either a bad EVAP pressure sensor, a clogged fuel tank relief valve, EVAP lines, EVAP wiring, or a bad fuel cap….

P0451 symptoms for Town and Country

In general, P0451 won't have any effect on the manner that your Town or Country drives and runs.  Fuel mileage The may be affected a little, but it is not unavoidable. Service engine light will soon be on One will be found.  It is possible to also feel the slight The smell of gas. 

The first thing to do is focus on the EVAP code that you have.

Chrysler Town and Country: P0451

Below are some common reasons for P0451.

Bad/Missing Fuel Cap

To diagnose P0451, the easiest way to begin is by looking at your fuel cap.  Since a missing, bad, or under-tightened fuel cap can make your Town and Country throw this code it’s a great place to start.

If you’ve gotten a “tighten fuel cap” message recently, but the cap was already tight, that’s a strong indication that there could be something wrong with the fuel cap.

A rubber seal is placed around fuel caps to prevent them from coming into contact with fuel receivers.  You should ensure that the seal isn't dry-rotted or broken.  It should be replaced if it becomes damaged. New gas cap This could be the solution you are looking for to your problem.  Often, P0451 is misdiagnosed at the fuel cap.

EVAP Lines and Wiring

Next, check the EVAP lines and hoses to see if they are causing your P0451 problem in your Town and Country.  Be aware of where these connect to each other, be near exhausts, and touch anything that may slowly cut through them. 

You should follow the same procedure when checking your wiring harness.  It should be checked to make sure it is not damaged.  You should pay particular attention where the plug connects to the EVAP pressure sensor.  It is possible to have the harness replaced if the plug appears loose or damaged.

It is possible that the carbon canister might be dangerous.

Low EVAP Pressure Sensor

It's a perfect time to test the fuel pressure sensor.  You’ll need a good scanner.  You’ll want to test to see if it is within the specs that Chrysler requires before getting a new one.  Here’s a fantastic video on how to do just that:

Oil Tank Pressure Relief Valve

After everything is in order, I'd recommend a smoke test to check the fuel tank pressure relief valve.  These are often difficult to reach.  Here’s a link to a great video on how to Find the source of the leak if you don’t have a smoke machine.

Final: Conclusion: Chrysler Town and Country P0451

Finding P0451 is not always easy.  The good news is that if that’s the only code that your Town and Country has, it shouldn’t really be a breakdown risk.

You can leave any comments or suggestions below.  We wish you all the best!