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:
Spots on interior plastic, metal, or wood surfaces
Cleaning interior plastic components should
be done with a cleaning agent specially
designed for this purpose. Consult your Volvo
retailer. ...
Cleaning the interior
Only use cleaning agents and car care products recommended by Volvo. Clean regularly
and follow the instructions included with the car care product.
Upholstery care
Fabric
Clean with soapy water ...
Changing coolant
Normally, the coolant does not need to be
changed. If the system must be drained, consult
a trained and qualified Volvo service technician.
Do not top off with water only. This reduces the
rust- ...