Specifications

1979 Volvo 264 265
be replaced more often when driving under dirty and dusty conditions. The filter cannot be cleaned and,
therefore, should always be replaced with a new one.
pg. 51 Emission control system
Lambda-sond
TM
(oxygen sensor) system
This is an emission control system designed to reduce emissions and improve fuel economy.
An oxygen sensor monitors the composition of the exhaust gases leaving the engine. The exhaust gas
analysis is fed into an electronic unit which continuously influences a frequency valve. This adjusts the
air-fuel ratio to provide optimum conditions for combustion and efficient reduction of the three major
pollutants (hydrocarbons, carbon monoxide and nitrous gases) by a 3-way catalytic converter.
Change oxygen sensor unit and inspect electrical connections of Lambda-sond
TM
system.
The oxygen sensor must be replaced every 15,000 miles (25,000 km).
At the same time the electrical wires and connections of the Lambda-sond
TM
system should be inspected
for chafing and corrosion.
Replace as necessary.
pg. 52 Emission control system
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