Use your wrench or ratchet and socket to screw the new O2 sensor into place, and tighten the sensor down securely. Connect the wires to the appropriate electrical socket.
Replacing one of these O2 sensors is quite easy.
Instructions
1. Place the Oxygen sensor you pleasure to exchange, near the catalytic converter on the exhaust manifold. The sensor looks like a golden peg with wires coming out of it.
2. Disconnect the wires by hand from where they hook into the HHR's electrical system. Take care not to damage the electrical socket, as you will need to plug the new O2 sensor back into it. But don't worry about damaging the O2 sensor's wires; you won't be reusing them.
3. Use a wrench or ratchet and socket to loosen and unscrew the O2 sensor. Use extra force if you haven't changed out the O2 sensor for a long period of time. Safely discard the sensor.
4. Spray the threads of your new O2 sensor with WD-40 or a similar lubricant, and then do the same to the threads of the screw-in hole from where you removed the old O2 sensor. This will ensure that you can screw the sensor in smoothly and without having to force it--which could potentially damage the threads.
5.Defective O2 sensors are one of the most customary causes of failed smog tests.An O2 (Oxygen) sensor is a limited Slogan that helps your vehicle's onboard pc overseer and adjust the vastness of air and fuel in your engine. The Chevrolet HHR crossover SUV has two oxygen sensors, one on the exhaust manifold conscientious to the front (toward the engine) of the catalytic converter, and one directly extreme the catalytic converter.
