VW gold question w/ check engine light

Hello, I'm the new guy here and I was wondering what does it mean when the check engine light comes on during a straight driving. The engine would seem to loose a little bit of power and the check engine light comes one, but I have the AC going. It will seem to slow down and the engine would kind of seem to sputter a little bit, but when I press on the accelerator for more power, the light goes off. Is it the injectors or is it something minor or major. Please help. Thanks in advance,

Reli

It means there is a problem with the engine management or emissions systems. If this is on a '94 you can read the codes youself. I've posted instructions on several threads in this forum.

But, I also notice that this only occurs when the AC is on. Soon as I turn off the AC, it runs fine.