Power brakes function only when theengine is running

Volvo XC90 / Volvo XC90 Owners Manual / Starting and driving / Brake system / Power brakes function only when theengine is running

Power brakes function only when theengine is running - Brake system - Starting and driving - Volvo XC90 Owners Manual - Volvo XC90

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:

    Cleaning the sensors
    Location of the front sensors Location of the rear sensors The sensors must be cleaned regularly to ensure that they work properly. Clean them with water and a suitable car washing detergent. ...

    Main AUX menu
    AUX menu AUX input volume Audio settings ...

    Comfort
    Comfort mode offers a somewhat softer ride and the transmission shifts gears at lower rpm. This mode is particularly suitable for long-distance highway driving. The indicator light in the butto ...