Code P1457

Welcome to 2CarPros.

Have you noticed any driveability issues? Based on experience, your mechanic is most likely correct. If it drives the same as always, you will be fine. However, if you want to replace it, that's your call. It isn't hard to do.

The component is mounted on the EVAP canister and is actually called a canister vent shut off valve. Often times, the valve will corrode and not move causing this code. If you look under the rear of the vehicle near the fuel tank, you will see it. I attached a few pics to help you identify it.

Now, before just replacing it, confirm there are no damaged or disconnected vacuum hoses around the EVAP canister. That can also cause this code. However, chances are the valve in question is stuck in the open position.

To replace it, remove the vacuum hose going to it and the two screws which hold it to the canister. It should pull straight out. If it doesn't, try turning it 1/4 turn counterclockwise to see if it will come out.

Once you get the new one, make sure it also has a new o-ring to prevent leaks. I always clean out where the valve goes and lubricate the new o-ring with Vaseline to prevent damage to the new o-ring. LOL

Although the car will most likely continue to run fine, it really should be replaced.

Pictures below.

1) I highlighted some of the vacuum hoses to check.

2) shows the part being removed.

3) it just a better picture of the part and canister.

Let me know if you have questions or need help.

Take care,
Joe

Wow, thank you so much for those diagrams. That will help my son so much. No, my car isn't running any differently but I would want to get it fixed anyway. Not only for the environment but also because if something else goes wrong I won't know it because the check engine light will already be on from this problem. Thanks again!

Welcome back:

You are very welcome. Let me know if you run into trouble or have questions. Also, make sure he checks for any issues with all the vacuum hoses there.

Take care and let me know if you get it fixed.

Joe

I figured I was going to have this looked into before I would need a new inspection, which isn't until this October. A couple of weeks ago I got a tune-up on my car. Since then, the light has been off and hasn't come back on. What this code is for shouldn't have anything to do with a tune-up, right?

A tune up would't cause it. However, when working on it, something may have been damaged or disconnected causing a leak.

Joe

I don't understand what you're saying. When the car was worked on when? During the tune up? But the light went off after the tune up. Not on.

Hi,

Yes, the tune up. If the light has remained off since then, it is even possible that the tech reconnected something causing a vacuum leak. Has it turned on at all since the tune up?

Joe

No, it hasn't gone back on at all. My neighbor did it. All he did was the plugs, wires, rotor and distributor cap.

Since it hasn't come back, I would let it alone. There is a chance it will eventually turn on, but there is also a chance it was a false reading for one drive cycle and there really isn't a problem.

Just for curiosity, how many miles have you put on it since the tune up? I'm trying to determine if you have completed a drive cycle for this component. If you have and there is no light, you are good to go.

Let me know.
Joe

I've driven it, maybe, a hundred miles. Not all at once, just here and there. Could disconnecting the battery have just temporarily shut it off?

If you have already driven it 100 miles, chances are it will stay off. By now, it should have reset.

Anytime the battery is disconnected, it can rest things. However, most drive cycles are completed within 40 to 50 miles. I think you're going to be okay.

Let me know if it comes on or if you have other questions.

Take care,
Joe