Power brakes function only when the engine is running

Power brakes function only when the engine is running  - Brake system - Brakes - Your driving environment - Volvo S60 Owners Manual - Volvo S60

The power brakes utilize vacuum pressure which is only created when the engine is running. Never let the vehicle roll to a stop with the engine switched off.

If the power brakes are not working, considerably higher pressure will be required on the brake pedal to compensate for the lack of power assistance. This can happen for example when towing your vehicle or if the engine is switched off when the vehicle is rolling. The brake pedal feels harder than usual.

    See also:

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    If the BRAKE and ABS warning lights comeon at the same time, this could indicate afault in the brake system.
    • Stop the vehicle in a suitable place and switch off the engine. • Restart the engine. • If both warning lights go off, no further action is required. • If both lights are still on after the eng ...