check engine light

I would say its the canister most likely but inspect the connections as well.

Purge valve can also cause a leak, a bad gas cap or cap not fully tightened can also cause an evap emission related code. The system needs to be tested to see where the fault is. Repair shops can use a machine that generates non flammable inert smoke to pinpoint the source of the leak. Solenoids can be activated closed to keep the smoke in the system to check for leaks and see if the solenoids are good or not.

there is a small 90 degree vaccuum line under the air filter housing that is the most common failure in the chrysler vans. a simple 3 dollar hose. check it Roy