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- Identify the faulty sensor. Before beginning, connect the OBD II scan tool to the vehicle and read the codes to determine which specific oxygen sensor has failed and needs to be replaced.
- Raise the vehicle. Once the faulty sensor has been identified, raise the vehicle and secure it on jack stands. Be sure to raise the vehicle on the side which you will allow you to access the oxygen sensor that needs to be replaced.
- Disconnect the oxygen sensor connector. With the vehicle raised, locate the faulty oxygen sensor and disconnect the wiring harness connector.
- Remove the oxygen sensor. Using the oxygen sensor socket or the appropriate size open end wrench, loosen and remove the oxygen sensor.
The purpose of the rear O2 sensor(s) is to monitor the oxygen content of the exhaust gasses leaving the catalytic convertor. If one or more of the O2 sensors are faulty, your car willnot pass the emissions test. If you drive your car with a faulty oxygen sensor, you may get poor gas mileage and it can damage the catalytic converter.
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Dec 22, 2015 · The most popular service booked by readers of this article is Oxygen Sensor Replacement. YourMechanic’s technicians bring the dealership to you by performing this job at your home or office 7-days a week between 7AM-9PM.
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Nov 4, 2023 · Once the old sensor is out, install the new sensor. Most new sensors come with anti-seize pre-applied to the threads. Or, they’ll have a tube of anti-seize in the box. If it’s not pre-applied, coat the threads of the sensor with anti-seize before installing. Refer to the instructions or a shop manual for the proper tightening torque.
Nov 3, 2024 · Unscrew the oxygen sensor using a ratchet wrench. The easiest way to detach the sensor is by using a 3 ⁄ 8 in (0.95 cm) ratchet wrench fit with a 7 ⁄ 8 in (2.2 cm) oxygen sensor socket. If you don’t have one, try using an open end wrench. Fit the wrench over the sensor where it plugs into the exhaust line.
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With the old oxygen sensor removed, it’s time to install the new one. Take care to install the new sensor in exactly the same location and orientation as the old one. You should tighten the new oxygen sensor to the manufacturer’s recommended torque settings.
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Where are oxygen sensors located in a catalytic converter?
Mar 21, 2024 · Oxygen Sensor Location. The oxygen sensor is found in the exhaust system. It can be found near the engine or on the exhaust manifold. Many cars have several oxygen sensors, but they are all monitoring the amount of oxygen in the exhaust. If the car has more than one oxygen sensor, the other will be located behind the catalytic converter.
