What are the reasons for the sudden display of system failure in the Audi A4L?

[DelEzra]

Audi A4L suddenly displays system failure for the following reasons: 1. Brake Pads: Severely worn brake pads. When brake pads with sensor wires wear down to the limit, the sensor wire automatically completes the circuit, triggering the fault light. 2. Brake Fluid: The brake fluid level might be too low. Brake fluid plays a crucial role in the vehicle's braking system. When the driver presses the brake pedal, the force applied is transmitted by the master cylinder piston through the brake fluid to the wheel brake cylinders, causing the brake pads to contact the wheels and stop the vehicle. Low brake fluid is often accompanied by noticeably reduced braking power, and in severe cases, a complete loss of braking force. 3. Compression Pressure: If the basic conditions for proper combustion are not met, driving performance issues may arise. Compression pressure is one of these basic conditions. It depends on the amount of air-fuel mixture in the cylinder and the piston stroke. These operations are fundamental engine functions, and abnormal compression pressure can lead to driving performance issues.