The Oxygen Sensor in Dodge Caravan vehicles: The Oxygen sensor is used to establish the amount of unburned oxygen in the exhaust to enable the engine control computer to come up with correct air-fuel mixture to enhance the engine's performance while reducing emissions. Since the sensor creates a voltage signal proportional to the oxygen concentration, the engine can work in a 'closed loop' manner which improves the efficiency of the catalytic converter. The oxygen sensors used in Dodge Caravans mainly consist of zirconium dioxide, they are of narrow-band and wide-band types. The narrow-band sensors supply either rich or lean signal and on the other hand the wide-band sensors supplies a wider band of air-fuel ratio signal. These sensors can get damaged with time due to contaminants that affect efficiency in terms of emissions of fuel. Thus, constant check and maintenance of the Oxygen Sensor are crucial for the optimal of the Dodge Caravan.
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