Buick 12612430 Sensor Assembly, Heated Oxygen (Position 2, Post, Converter)

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When servicing an oxygen sensor, you should be careful not to damage or remove the permanently attached pigtail and electrical connector. It is important to keep contaminants away from the electrical connector and the louvered end of the sensor. Avoid using cleaning solvents and handle the sensor delicately. Ensure that the silicone boot is correctly positioned to prevent melting and incorrect operation.

The engine cover may need to be removed for certain models, while for others, the vehicle should be raised and securely supported on jackstands. The upstream oxygen sensor electrical connector should be disconnected and unclipped from any retainers before removing the sensor.

When servicing an oxygen sensor, you should be careful not to damage or remove the permanently attached pigtail and electrical connector. It is important to keep contaminants away from the electrical connector and the louvered end of the sensor. Avoid using cleaning solvents and handle the sensor delicately. Ensure that the silicone boot is correctly positioned to prevent melting and incorrect operation.

Be aware that oxygen sensors, installed in the exhaust manifold or pipe, can be difficult to loosen when the engine is cold due to contraction. To avoid damage, run the engine for a minute or two before shutting it off. Be careful not to burn yourself during this procedure. When servicing an oxygen sensor, be careful not to damage or remove the permanently attached pigtail and electrical connector, keep contaminants away from the electrical connector and the louvered end of the sensor, avoid using cleaning solvents, handle the sensor delicately, and ensure the silicone boot is correctly positioned to prevent melting and incorrect operation. To replace the sensor, note that there are four oxygen sensors; one in each exhaust manifold, and one just after each catalytic converter. For the upstream oxygen sensors, remove the engine cover, disconnect the upstream oxygen sensor electrical connector, remove the sensor, apply anti-seize compound to the threads if reinstalling the old sensor, and install the sensor securely. For the downstream oxygen sensors, raise the vehicle and support it securely on jackstands, locate and disconnect the downstream oxygen sensor, unscrew the sensor, apply anti-seize compound to the threads if reinstalling the old sensor, and install the sensor securely.

Grease, dirt, and other contaminants should be kept away from the electrical connector and the louvered end of the sensor. Cleaning solvents should not be used as they can cause damage.

THERES 4 02 SENSORS ALL THE SAME PART# 12612430 PER VIN#