How to Solve the Hard Brake Issue in 2013 Peugeot 408?

1 Answers
LeAddyson
07/29/25 11:04pm
Here are the solutions for the hard brake issue in the 2013 Peugeot 408: 1. Restart the engine: Try pressing the brake pedal firmly to restart the engine. Once the engine is running, the brake booster pump will resume operation, and the brake pedal will return to normal. Below is extended information on the causes of hard brakes: 1. Vacuum brake pump failure: The vacuum brake pump has two chambers: one connected to the intake manifold and the other to the external atmosphere. When the engine is running, the intake manifold draws in air at a high velocity, creating negative pressure (negative pressure chamber). The other chamber (positive pressure chamber) is connected to the atmosphere. During braking, the pressure difference between the two chambers generates assistance, applying pressure to the brake fluid to create friction between the brake pads and discs, thereby producing braking force. If this system fails, braking becomes difficult. 2. Brake booster pump issue: The brake booster pump only generates vacuum when the engine is running. When the engine is off, it relies on residual vacuum for assistance. Restarting the engine will restore normal function, indicating this is not a malfunction.
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