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:
Security
Volvo's passion for safety also extends to issues of personal security. The
Volvo XC90 is fitted as standard with a wide range of features designed to
protect occupants from burglary, theft and as ...
Starting and stopping the engine
See page 114 for information on starting the engine and switching it off. ...
Spare wheel
The following instructions only apply if you have purchased an accessory temporary
spare wheel for your vehicle. If there is no temporary spare wheel in your vehicle,
please see 284 for instructio ...
