It's a "slight" evaporative emmisions leak.
These minivans seem to have an issue with the gas caps, most of the people I've heard of bought an after market gas cap to make it go away, a couple just made sure they tighted their gas caps better. If it's not that, then take it to a mechanic.
(After changing the gas cap take off the neg batt terminal for say an hour to reset the codes, if it still turns up, talk to a mechanic.)
call your local parts store
means its time to buy a Chevy
No
No.
A Dodge Caravan does not have a reset switch.
Trouble code P0420 means: Catalyst Efficiency Below Normal (Bank 1)
How to replace or change the 1997 Dodge Caravan 3.3 liter engine
Yes!
Trouble code P0108 means:Manifold absolute pressure/barometric pressure circuit high input
Yes
The torque specification is 13 foot pounds or 130 inch pounds for the spark plugs on a 2007 dodge caravan 3.3 liter
.050 "
I can get to it but how does one get it out?