Power brakes function only when the engine is running

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:
Brake lights and taillights
The brake lights and taillights are replaced from
inside the cargo area.
NOTE
Before starting to replace a bulb, see
page 322.
1. Open the panel.
2. Remove the bulb holder by turning it coun ...
How can I prepare for my next OBD II emission inspection?
• If your Check Engine (MIL) light is lit – or
was lit but went out without service, have
your vehicle diagnosed and, if necessary,
serviced by a qualified Volvo technician.
• If you recently h ...
Infotainment system volume
If no phone call is in progress, volume for the
infotainment system can be adjusted in the
normal way with the infotainment system's
VOL control or from the steering wheel keypad.
Infotainment ...
