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How to Use a NOx Control

A NOx control sensor measures the nitrogen oxide that a car puts out. If this sensor fails, a car will not pass its emissions test. To test the NOx sensor on a car, use an On-Board Diagnostic (OBD) scanner. You do not have to be a car mechanic to do so.

Instructions

1

Turn off the ignition and locate the cars Data Link Connector. This is a 16-pin plug that an OBD scanner plugs into, and is generally located under the cars steering wheel.

2

Connect the OBD scanner to the Data Link Connector. Switch on the ignition. Turn on the OBD scanner.

3

Press the Read button on the scanner. (Some scanners will have a Scan button instead.) Wait for the troubleshooting codes to appear on the scanners display.

4

Look up the troubleshooting code in the scanners manual to see if the NOx sensor is faulty. If the sensor is faulty, you must have it replaced to pass an emissions test.

5

Unplug the scanner from the car and turn off the ignition.

Posted by Unknown at 4:45 AM

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