If your check engine light is on, click 01-Engine . The status bar at the bottom will change from "Not Connected" to "Ready." You have now successfully performed a VCDS open controller action.
Some controllers are "stubborn." For instance, air suspension calibration on an Audi A8 might require a security key that the controller only accepts once in 50 attempts, leading to frustrating loops where the user is kicked back to the start. The Risks: When Things Go Wrong vcds open controller
| Situation | Controller | |-----------|-------------| | Check engine light | 01-Engine | | ABS/ESC light | 03-ABS Brakes | | Airbag light | 15-Airbags | | Power windows not working | 42-Door Elec Driver / 09-Cent. Elect. | | Retrofitting cruise control | 01-Engine + 16-Steering Wheel | | Coding a new battery | 61-Battery Regul. (if equipped) | If your check engine light is on, click 01-Engine
A failed "Open Controller" attempt is itself a diagnostic clue. The Risks: When Things Go Wrong | Situation