I am getting check engine lights in my MK2. About a week ago it came on and I turned the car off and then turned it back on again and it didn't come back on. Then on Sunday it came back on so I turned the car off and then it didn't do it until I started the car this morning it came back on. I don't know what it could be, the car runs fine. I don't know how to get codes on an Mk2 like I could do on my old MK3. Anyhelp would be greatly appreciated.