The Nissan Rogue Oxygen Sensor keeps track of the unburned oxygen in the exhaust so the engine control computer can maintain a balanced air fuel mixture and lesser emissions. Each Oxygen Sensor in the pipes, pre and post catalytic converter, is contained within a steel shell and consists of a zirconium dioxide element which is coated with platinum electrodes. The zirconium dioxide sensor is protected by ceramic and has a vented steel shell. The built-in heater will heat the sensing element to roughly 600°F. This causes oxygen ions to move from one platinum layer to another and produce a voltage that moves between about 0.1 and 0.9 volt. A high voltage indicates a rich mixture, whereas a low voltage signifies a lean mixture. Therefore, closed-loop fuel control optimizes catalytic converter efficiency. At least two of these Oxygen Sensor assemblies are applied by late-model Rogue vehicles, with the upstream unit providing primary feedback and the downstream unit acting as a catalyst monitor. A malfunctioning Oxygen Sensor may cause the engine computer of the Nissan to default to a richer mixture which uses more fuel. Nissan Rogue replacement replenishes control while maintaining rapid cycling of the Oxygen Sensor signal. Nissan Rogue's emissions consistently stay within standards.
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