Volvo 2001 S80 - Manual (Page 157)

2001 Volvo S80
1) Replace at 105,000 miles (168,000 km)
2) Brake fluid should be changed at owner request every second year or 30,000 miles (48,000 km).
The fluid should be replaced once a year or every 15,000 miles (24,000 km) when driving under
extremely hard conditions (mountain driving, etc.).
3) Rotate tires at owner request.
The following items should be checked weekly by the driver (it takes only a few minutes):
Engine oil level, brake fluid level, radiator coolant level, operation of all lights, horns, windshield
wipers, tire pressure (all five tires), windshield washer fluid level
The following should also be carried out at regular intervals:
Washing (check all drain holes), polishing, cleaning
pg.109 Fuel/emissions systems
Fuel system
The fuel system continually compensates for variation in engine load, speed and temperature. A mass air
flow sensor continuously measures the inducted air and makes rapid adjustments for changes in air
temperature and density, to balance fuel economy, emissions, and engine power requirements.
Heated oxygen sensor
This is an emission control system designed to reduce emissions and improve fuel economy. The heated
oxygen sensor monitors the composition of the exhaust gases leaving the engine. The exhaust gas
analysis is fed into an electronic module. This adjusts the air/fuel ratio to improve combustion and
reduce the three major pollutants (hydrocarbons, carbon monoxide, and oxides of nitrogen (NOx)) via a
three-way catalytic converter.
Crankcase ventilation
The engine is provided with positive crankcase ventilation which prevents crankcase gases from being
released into the atmosphere. Instead, the crankcase gases are routed to the intake manifold and
cylinders.
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