DTC P0455 and P0457

P0455 refers to a very large leak (fuel filler cap fell off etc, ) in EVAP system between the fuel tank and EVAP canister purge volume control solenoid valve.
P0457 also relates to a vacuum leak in the evaporative emission system.
It could be just as simple as the gas cap loose.

Here is the system lay out so you can start inspecting hoses and checking the EVAP valve. Check the gas cap like PATENTED_REPAIR_PRO suggested and then all hoses, if everything looks good I would suspect the charcoal canister. Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.

Cheers, Ken

Hopefully that is all that it was.

The code criteria for the P0457 on that car basically says the EVAP test saw a large change in the in tank pressure within thirty seconds of the system reading a change in fuel level. The most common cause = bad fuel cap or rusted/damaged filler neck that does not allow the EVAP system to even start to pull a vacuum on the system.

I thought it was fixed. If the CEL has not come back on, I would not replace the EVAP solenoid. Maybe hold onto it just encase though. But if the CEL light never comes back on, I would not do anything to it. It might have just been the cap, unless of course it has any other symptom other than that CEL and codes.

As PATENTED_REPAIR_PRO says, if the light is off it should be fixed.

If it does come back on then you might want to rig up a way to smoke test the system to find the problem. EVAP leaks can be virtually anywhere, and depending on the code can be anything from a gas cap sized hole down to a leak the size of this - o - those can drive you crazy trying to find.

If you remove the charcoal canister you can plug the outlets and apply a small amount of pressure to see if there are any leaks while you look at the hoses.

Please let us know.

Okay, which code(s) are showing now? There is also the option of buying a smoke machine, the "paint can" style would work okay for the testing you need to do. Just be sure to follow one simple rule (which really should apply to all smoke machines) keep the air/nitrogen pressure on until the machine is cold and remove the hose from the vehicle while the machine cools off. That prevents fuel vapor from flowing back into the hot wire/glow plug inside and possibly causing a problem.

The paint can smoker is a simple coil of nichrome wire wrapped around a wick that is soaked with mineral oil. Others use a GM glow plug as the heat source. Then use a common low pressure BBQ gas regulator to drop the air/nitrogen pressure down to about.75 psi. The entire thing is built using a metal paint can.

In operation they work just like the expensive ones but without all the extras like switches/lights/flow meters (you could easily build those in if you wanted to but for a simple smoke generator they are not needed). Connect to the vehicle battery and wait thirty to forty five seconds for them to create smoke. Connect the hose to the test port or whatever you are testing, hook up the air to "push" the smoke through the system.
Price wise it depends, there are DIY builds all over the internet, plus folks sell them on eBay.

I used one for a while and it did the same job as the "store bought" versions I have now. However 99% of them use the same type of parts inside as the paint can units, just in a nicer case with the lights and switches to make them easier to use.
Price wise it depends on if you build or buy. I had maybe $30.00 in mine.
Look at Brian B on YouTube for more in depth information.

They also use similar items around restaurants, theme parks and resorts to create scents by adding different oils to the mix. Nothing like walking around a park around lunch or dinner time and smelling the subtle aroma of burgers or steak cooking, without a single food place in sight, or that popcorn smell at the theater from the popper that is off. Or the prank of putting a few drops of lavender or lilac scent into another "macho" guys smoke machine. Not that I would do such a thing. LOL

For the DIYer who might use a smoke machine a couple times they work. For finding the smoke from a small leak you want a light like a laser pointer or similar not a flood type light. The smaller the leak the harder it can be to find, that is actually where adding a scent can help, your nose can help track it down.

Please keep us in the loop whichever way it works out.

Thank you for using 2CarPros.