Check engine light has been coming on intermittantly latley so I tried to get error code. I jumpered 1 and 2 on the diagnostic plug and turned ignition on and check engine light came on for 4 seconds and off for 6 seconds and then it lights up again for about 7 seconds and then it goes out and that's it, no flashes like it is suppose to do. What does it mean when the check engine light comes on for about 7 seconds and then goes out??? I was expecting to see a series of flashes telling me what error code it is. Thanks!!!