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07 during your trip – Volvo 2013 XC70 User Manual

Page 277

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07 During your trip

Refueling

07

275

Heated oxygen sensors

The heated oxygen sensors monitor the oxy-
gen 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 combus-
tion to help reduce harmful emissions.