I have 2000 audi a6 2.7 auto matic with 78k. When i turn the key into accesory, the only lights that come up are epc, airbag and battery, i thought engine light has to come on and oil light, on my previous audi that stuff came up, somewhere in this forum it said that it might be ecu or ecm might be bad or not connected, please help, the car wont go through inspection right now because when he plugs in the obd scanner it gives a link error, dont know why this is like this, first time having a major issue with audis, and this is 4th one please help