Not sure if this is the correct newsgroup since there are two (aircooled and watercooled). I have a 1996 Jetta TREK (2.0 liter). My check engine light has come on before now then went off by itself a little while later. Now it has come on again and I don't know why. I checked the gas cap to make sure that was on tight, and also got the oil changed the other day. Do I need to worry about this, or take it in to get checked? Thanks.
-db