owners manual Volvo 960

owners manual Volvo 960 - year of production: 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998 - Volvo 960 owners manual EN

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text version of content this owner's manual page from owners manual to the vehicle Volvo 960, year of production 1990 - 1998:

1996 Volvo 960 Heated oxygen sensor This is an emission control system designed to reduce emissions and improve fuel economy. The heated oxygen sensors monitor 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 provide optimum conditions for combustion and efficient reduction of the three major pollutants (hydrocarbons, carbon monoxide and oxides of nitrogen) by a three-way catalytic converter. Air pump system During cold starts, an electric pump is activated which directs air to the exhaust channels. This initiates a secondary combustion of exhaust gases which helps maximize hydrocarbon and carbon monoxide levels and reduces warm-up time for the three-way catalytic converter. The pump begins to function when the engine is started. It remains in operation until the three-way catalytic converter has reached normal operating temperature. A sound may be audible from the air pump during this warm-up period. This is normal. When idling, the air pump performs a self-diagnosis. A soft whining noise can be heard, which is also normal. pg. 8:11 Servicing file:///K|/ownersdocs/1996/1996_960/96960_806.htm (7 of 10)12/30/2006 10:13:10 AM

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year of production from: 1990

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