How Do You Check An Oxygen Sensor?
An O2 sensor measures the mixture of air to fuel to make sure your vehicle is running at the correct air/fuel ratio. The ideal mixture is 14.7 parts air to 1 part gasoline. Once the oxygen sensor has gathered this information from the exhaust gases, it sends the information to the vehicle’s ECU, allowing it to adjust the fuel mix as necessary. This ensures your vehicle will get the best power at the best possible fuel economy. Over time, these sensors do wear out. However, you can check an oxygen sensor before replacing it. Put the floor jack under the vehicle’s front jack point and jack up on it. The front jack point for most vehicles is located behind the radiator and is an extension of the frame of the vehicle. Place a jack stand under each front pinch weld and lower the vehicle onto the jack stands. Climb under the vehicle and unplug the electrical wiring from the O2 sensor housing. Connect the voltmeter leads to the feedback wire and ground terminals on the O2 sensor. Set the volt
