Chrysler Repair: 2001 town & country: code P0455, chrysler concorde lxi, 2000 chrysler concorde lxi

Question
how do i repair trouble code po455

Answer
Hi Dorothy,
If you have the interest in tracing over the hoses that connect the parts of the gas vapor recovery system then if you look on the diagram which is posted on the underside of the hood just look for the vapor recovery canister and see the hoses that attach to it and the places those go and see if there are any detached or cracked ones. Another possibility is that the gas cap is not on tight or that it has a damaged rubber o-ring so it isn't sealing well.
At a shop they might do a test with a vapor to find a leak.
Here is a dialog I had yesterday with a person who had the same code and it mentions what the other possibilities are for the code:

" 2000 chrysler concorde lxi: code P0455
Question:  i have had my Concorde for 2 years now and the check engine light come on giving me a code of i believe p0445 stating large evap leak... when system was checked on three different times no leaks were found they push some kid of smoke thru the system.... they tested my gas cap all 3 x they stated this was my issue they would change the cap and my light would reset but days after it comes right back on have you had any experience with this code and other possibilities of the reason for the light coming on... could it be the sensor???????
 
Answer:  Hi April,
If there are no leaks, then the other possibilies are that the valve for the system which controls the capture and subsequent release of the vapors for recycling (called the purge solenoid) is stuck ajar or is leaking when it is supposed to be closed, or the leak detector pump monitor circuit is failing. They both can be checked with the diagnostic readout box at a competent Chrysler or independent shop.  Let me know if you want to visually/mechanically check out the solenoid valve and I can tell you how to find it. Tell me which engine you have.
Roland
PS I believe you meant a code 0455."
So start with the simplest, the gas cap, inspect that and make sure you have been putting it on tight. Then check over the hoses of that system. Then consider a shop pressure test of the system or maybe first inspect the vapor switch and its solenoid, and finally whether the pump that test the system in intermittently failing.
Good luck on this and please let me know what you learn in correcting it.
Roland