Must Know Before Buying:

The following information is for instructional and guidance reference only. If Check Engine Light is on or an OBDII Trouble/Fault code occurs after installation, check the sensor with a voltmeter as below. If the sensor is good, further diagnosis is required.

Reading the Oxygen Sensor’s Signals

Use a 10-megaohm digital voltmeter. Hook up the voltmeter's red probe to the sensor's signal wire and the black probe to engine ground. (Use back probe method, DO NOT pierces the wire.)

Start the engine and check the sensor’s voltage signals on your voltmeter. The sensor voltage should cycle or fluctuate within the 100 mV-900 mV (0.10 to 0.90V) range approximately. This means the sensor is operating properly.

Position of the Oxygen Sensor

Bank 1 Sensor 1 - Driver side before converter (front)

Bank 1 Sensor 2 - Driver side after converter (rear)

Bank 2 Sensor 1 - Passenger side before converter (front)

Bank 2 Sensor 2 - Passenger side after converter (rear)

Pls click the the VIDEO and see more details if still not so clear: https://www.youtube.com/watch?v=KxhrCl3B22M&feature=youtube

Please take a video clip of the voltmeter and contact us if our sensor:

Goes above range between 0.1 and 0.9 volt

Remains below 0.5 volts

Stays fixed at a particular voltage

you’re free to choose replacement or refund if our sensor fails to work.