Heated oxygen sensors

The heated oxygen sensors monitor the oxygen content of the exhaust gases. Readings are fed into a control module that continuously monitors engine functions and controls fuel injection. The ratio of fuel to air into the engine is continuously adjusted for efficient combustion to help reduce harmful emissions.
See also:
Navigating in the menus
Infotainment settings are made via the system's menus. Press one of the mode
buttons (RADIO, MEDIA, or TEL—see the illustration on page 206) to select it and
access its specific menus. When a ...
Comfort and convenience
While the interior of the Volvo S40 places an emphasis on style, form has not
been allowed to take precedence over function. The fascia ergonomics have been
carefully designed and drivers will fin ...
Snow chains, snow tires, studded tires
Winter driving conditionsSnow chains
Snow chains can be used on your Volvo with
the following restrictions:
• Snow chains should be installed on front
wheels only. Use only Volvo approved
snow ...
