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:
When does BLIS function
The system functions when your vehicle is
moving at speeds above 6 mph (10 km/h).
When you pass another vehicle:
The system reacts when you pass another
vehicle at a speed of up to 6 mph (10 km/ ...
Under the Hood
A light-pressure turbocharged 2.5-liter inline-five-cylinder engine delivers
208 horsepower to a five-speed-automatic transmission. Volvo’s bi-turbo
2.9-liter inline-six-cylinder engine in the T6 ...
Limitations
Strong sunlight, reflections, extreme light contrasts, the use of sunglasses,
or if the driver is not looking straight ahead may make the visual warning signal
in the windshield difficult to see. ...
