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:
Disconnecting an external device
The external device is automatically disconnected
from the audio system if it is moved out
of range. ...
Tire ratings
Speed ratings
The speed ratings in the table translate as follow:
Load ratings
See page 276 for an explanation of the load rating on the sidewall of the tire. ...
Deposit control gasoline (detergent additives)
Volvo recommends the use of detergent gasoline
to control engine deposits. Detergent
gasoline is effective in keeping injectors and
intake valves clean. Consistent use of deposit
control gasol ...
