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What does it mean when the engine yellow light is on and the brake pedal is hard to press?

1 Answers

DelAllie

07/30/25 12:06am

When the engine yellow light is on and the brake pedal is hard to press, it is related to the vacuum booster pump and the brake booster pump. Vacuum booster pump leakage: If the car's vacuum booster pump is leaking or malfunctioning, it's important to understand that the force applied to the brake pedal is amplified by the brake booster pump. If it fails, the brake loses its main force, making it difficult to press down. Related to the brake booster pump: If the brake pedal is pressed after the engine is turned off, this is also related to the brake booster pump. The brake booster pump continuously generates vacuum only when the engine is running. When the engine is off, it relies on the remaining vacuum assistance, which typically depletes after a few presses. However, this condition is not a malfunction and will be restored once the engine is started.

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