What is the reason for all the warning lights on the Audi A3?

[LaEmily]

Audi A3 warning lights all on reasons are as follows: Bus failure: Modern car dashboards have various indicator lights or alarms under the mask. If all the warning lights are on, it is due to an ECU CAN bus failure or poor contact at the ECU CAN interface. Excessive dirt: Too much dirt and carbon deposits can cause abnormal air circulation, making it impossible to accurately control the normal air intake, resulting in unstable gas content and poor engine performance. Low fuel pressure: Low fuel pressure combined with poor constant pressure performance leads to a low system atomization level, making the car difficult to start.