Automobile engines are made up of a complex set of systems that are monitored by various types of sensors. The four-wire universal oxygen sensor is one of the sensors that monitors fuel consumption. This sensor measures the amount of unburned oxygen that is present in the oxygen when it leaves the vehicle, which is indicative of the fuel mixture. The four-wire universal oxygen sensor needs to be changed approximately every 60,000 miles and requires a specific wiring process.
Step 1: how to connect 4-wire oxygen sensor
Install the four-wire universal oxygen sensor. Cut the original wire connector exposing the copper ends of the wires.
Step 2: oxygen sensor 4 colored wires
Splice the new cables. Take the wires from the new sensor with the wires that were previously connected to the connector. These are the same cables that were removed from the connector in step 1.
Identify the different cables. One of the sensor wires is the ground wire, the other wire is the signal wire, and the remaining two wires are the heater circuit wires. All of these cables are color coded. Depending on the sensor brand the colors will vary. Identify your brand’s color code by referring to the chart in the “Oxygen Sensor Replacement” section of the following website: http://www.aa1car.com/library/o2sensor.htm
Warning; how to connect a 4 wire oxygen sensor
- Most likely, the color coding of the new four-wire sensor does not match the color coding of the original sensor, so be sure to refer to the instructions that came with the new sensor for accurate color-coding information.
Items you will need, 4-wire oxygen sensor connection
- Wire cutters
- Cable connectors