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Possible solution:
Had a similar problem on a similar vehicle...I think it may have the same engine.
My wife's 2002 Durango (just sold it!!!! :-)) had the engine light come on. Inspection station gave me the code for an Evaporation Leak Monitor. After changing the gas cap I reset the the Engine Light. Sure enough it came back on a few miles later. I traced the line from tank back to the engine and found a vacuum line that comes out between the engine and the battery and then under the fuse block. It gets dry and brittle and breaks at a connection with a GREEN cap(Important!). Thus causing an emission/vacuum leak and the light. Replaced the vacuum line for only a few bucks! Problem solved!! No more engine light!
On a 2002 you disconnect the neg. battery terminal. Put the key in the ignition and turn and hold it to start for 30 seconds and release. Reconnect cable and Engine light should be off/reset.
Try this also: turn the key clockwise to turn power on (not to start) and back. If you do this 2 or maybe 3 times ? the trouble code will be displayed on the dashboard. Worked on our 2002.
If you can find the code do a google search with your year vehicle, model and the code. There is tons of info. out there!
Good luck!
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