Can you turn off a check engine light without going to the dealer on a 1999 VW Jetta?

Pulling the ecm, or pcm fuse for a minute or so will reset it, most parts stores have scan tools and will reset it for free, if the light is indicating a problem, and it always is, you will need to repair the problem or the light will just come back on. If you are trying to get the car smogged you will need to drive it about 30 to 50 miles before it will pass.