Xterra Oxygen Sensor & Heater Problems
The Xterra is a compact sports utility vehicle manufactured by Nissan. The oxygen sensor on the Nissan Xterra is a component of the exhaust system. The sensor helps regulate the proper fuel-to-air ratio inside the engine. The heater core is a component of the engine system. It provides the necessary heat required to circulate engine coolant. Both the oxygen sensor and heater core keep the engine running. Problems with either of these devices can lead to a decrease in engine performance.
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Oxygen Sensor Function
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The oxygen sensor is located inside the exhaust manifold along the exhaust pipe. The sensor produces an electric charge to test the amount of oxygen in the exhaust system. This information is used to determine how much fuel is necessary in the engine system.
Oxygen Sensor Problems
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The most common problem with the oxygen sensor is that the electric charge becomes weak over time. A weak charge affects the validity of the reading, causing the air-to-fuel ratio to become imbalanced. The sensor can also crack or become loose, leading to no charge at all.
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Heater Core Function
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The heater core is behind the radiator, near the motor fan. As coolant flows through the engine system, the heater core provides heat to the passenger compartment to help maintain the engine's operating temperature.
Heater Core Problems
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Problems with the heater core affect the engine temperature, which must be maintained to keep the engine running smoothly. Common problems include a clogged heater core and corrosion. Once you suspect your Xterra has a faulty heater core, have your vehicle serviced immediately.
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References
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