We purchased this 03 Dodge Caravan new, recently the check engine light
came on, the van still runs fine, I took it to Advanced Auto, they put
the code checker on it and it came up with an emission leak problem, I
installed a new cap and disconnected the battery, the check egine light
was out for about 4-5 days and came back on, any ideas what I can check
for, she did say the fuel economy was down some.

             thanks
                Chet