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Oxygen sensors are not only an integral part of your 2004-2008 F-150's exhaust system, but they also play a significant role in the overall performance of the engine. Sampling the exhaust gas composition as it streams past, the oxygen sensors relay their findings back to the engine ECU where it is analyzed. Based on the feedback of the oxygen sensors, the ECU is then able to adjust the fuel trim and engine timing, in almost real time, to optimize the F-150's performance in relation to temperature, throttle position, engine load and a myriad of other factors. If one of the Motorcraft sensors were to fail, the ECU is programmed to fall back into a protection mode where the fuel mixture is enrichened for an overall loss of power and fuel economy. Fouled spark plugs are a common result of a failed O2 sensor as well. Furthermore, the oxygen sensors in your 2004-2008 F-150 can also show how well the catalytic converter is operating, which is also a detrimental piece to overall truck performance. NTK zirconia sensors exceed all the factory requirements and are a simple plug-and-play affair. An OBD II reader/handheld tuner or multimeter can be used to verify their operation. They may be a small part, but properly functioning O2 sensors are imperative to smooth engine operation. If in doubt, swap them out.


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2004-2008 F-150 Oxygen Sensors

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