Hi All....

   My service Engine light came on this morning.... The vehicle is a 97
dodge Caravan Sport with a 3.3 liter engine.  It has 142,000 miles on it and
I have kept up on the maintenance.. oil changes every 2000 miles, change
tranny fluid every 24,000 miles, complete tune up every 20-24,000 miles.
   I have done some diagnostics on it.... the manual says to depress the
trip and reset odometer buttons with the ignition switch in the off
position.  Once the two buttons are depressed, then turn the key to the on
position and wait until the odometer reading reads codE.... then if all is
good, it will return with a 999.  Well... I got all that, so I must be
missing something.  I mean why is the result telling me everything is in
good order when my light decided to come on?  Is there some other kind of
diagnostics I should be doing, and if there is, then how do I go about it?

Thanks in advance for any consideration..

Fwed