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.
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Overview
The smallest yet most expressively designed of all Volvos, the C30 has a
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High beam, Halogen
1. Remove the headlight housing from the vehicle (see page 306).
2. Remove the cover over the bulbs (see page 308).
3. Remove the bulb by turning it counterclockwise and pulling it straight out.
...
Overview
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