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What does it mean when the Audi A3 displays 'braking force limited' during ignition?

1 Answers
Teagan
07/29/25 5:10pm
It indicates a malfunction in the vehicle's braking system. Common faults include brake failure, brake deviation, and brake non-return. These three types of faults can damage the vehicle in minor cases and affect driving safety in severe cases, requiring prompt attention. Below are relevant explanations: 1. Brake Booster: The brake booster is a widely used braking assistance device in vehicles ranging from light to medium-duty, which can be broadly categorized into vacuum assist, hydraulic assist, and pneumatic assist. It includes components such as a hydraulic cylinder, support arm, pressure arm, and brake plate, characterized by hydraulic rods at both ends of the hydraulic cylinder connecting to the support arm and pressure arm, with a rubber-wheeled brake plate mounted on the pressure arm. 2. Principle: The brake booster utilizes the vacuum generated in the intake manifold when the engine is running to assist braking. The booster is typically a cylindrical unit approximately 20cm in diameter and 15cm in height. Inside the cylinder, there is a diaphragm with a push rod in the middle, dividing the cavity into two parts. One part is connected to the engine intake manifold via a pipeline, while the other part is exposed to the atmosphere when the brake pedal is depressed. The pressure difference between the two sides provides assistance for braking.
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