Lincoln 5L8Z-9F472-AA Sensor - Hego

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To service an oxygen sensor, warm the engine before removal to prevent damage. Avoid harming the pigtail or electrical connector and keep contaminants away from the sensor. Do not use cleaning solvents. Handle the sensor carefully and ensure the silicone boot is correctly installed. To replace the upstream sensor, locate it, disconnect the connector, and unscrew the sensor with a wrench or sensor socket. Apply anti-seize compound to the threads if reusing. Repeat the process for the downstream sensor.

OBD-II is an engine management system that allows vehicles to verify the accuracy of the feedback loop between the oxygen sensor and the PCM.

1. Disconnect the negative battery terminal. 2. Loosen the right front wheel lug nuts, raise the vehicle, and remove the right front wheel. 3. Remove the right lower engine splash shield. 4. Disconnect the downstream oxygen sensor electrical connector. 5. Unscrew and remove the downstream oxygen sensor. 6. Apply anti-seize compound if reinstalling the old sensor. 7. Install the sensor and tighten it to the specified torque. 8. Reconnect the battery and allow the PCM to relearn its idle and fuel trim strategy.