Nissan 22693-1KT5A Air Fuel Ratio Oxygen Sensor

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Be very careful when servicing an oxygen sensor as it has a permanently attached pigtail and electrical connector which should not be removed. Damage or removal of the pig-tail or electrical connector can adversely affect operation of the sensor. Grease, dirt and other contaminants should be kept away from the electrical connector and the louvered end of the sensor. Do not use cleaning solvents of any kind on the oxygen sensor. Do not drop or roughly handle the sensor. The silicone boot must be installed in the correct position to prevent the boot from being melted and to allow the sensor to operate properly. To replace the upstream oxygen sensor, remove the engine cover and exhaust manifold heat shield. Locate the upstream oxygen sensor electrical connector and disconnect it. Follow the wiring harness to the electrical connector, then unplug it. Detach the sensor wiring harness from any clips. Unscrew the sensor with an oxygen sensor socket if one is available. You may have to raise the vehicle and support it securely on jackstands to reach it. If you're going to install the old sensor, apply anti-seize compound to the threads to ease future removal. If you're installing a new sensor, the threads will already have anti-seize on them. Installation is the reverse of removal. Tighten the sensor securely. For the downstream oxygen sensor, raise the vehicle and support it securely on jackstands. Disconnect the wiring harness from the pigtail of the sensor. The downstream oxygen sensor is installed on the top of the exhaust pipe after the catalytic converter, under a heat shield - a crows foot, ratchet and an extension are required to remove the sensor. Unscrew the sensor using an extension and a crows-foot wrench. If you're going to install the old sensor, apply anti-seize compound to the threads to ease future removal. If you're installing a new sensor, the threads will already have anti-seize on them. Installation is the reverse of removal. Tighten the sensor securely.