Guys I need help with the above VCDS code on a mates car. I've done a lot of searching and it seems to have happend on a lot of platforms including A3 8L/TT 8N/RS4/Golf mk4. There is a lot of info about the APR map causing problems but the ECU in my mates car is standard. Ross-Tech say the following about the code: Possible Causes Engine Control Unit (ECU) defective Flash ROM (used in aftermarket "chips") defective Possible Solutions Replace ECU Contact aftermarket chiptuner for repair of their chip As this is a standard ECU it looks like a new one will be needed!!! Has anyone had any experience with this error on a standard Bosch ECU?