The OBD Ⅱ scanner could be the best gadget to possess for people who encounter car problems a lot. The OBD Ⅱ scanner not only can figure out the car issue precisely but also help save plenty of time, energy as well as money. And then how to use an OBD Ⅱ scanner?  The follow instruction may be helpful for you.

1. Plug the OBD Ⅱ  scanner into your car by the connector under the car steering wheel which is rectangular in shape with a 16-hole pinout.

2. After attaching the OBD Ⅱ scanner, turn the ignition key to the on position with the engine off.

3. You can press the read button on the OBD Ⅱscanner, and the OBD Ⅱ scanner will give you a detail by detail examination of your car.

4. The OBD Ⅱ scannerr will have a set of instructions for you to follow. As the scanners are made by many manufacturers and feature slightly different options, you will need to read the manual first to fully understand all of the functions. After a moment or two, one or more diagnostic trouble codes (DTCs) will be displayed, which you need to write down.

5. Now, you can see the diagnostic trouble codes (DTCs) on your scanner to see what goes wrong in your car. Some scanners are more advanced and will actually tell you what the trouble codes are and others will just give you the codes and you can either search online or have a code reference book to find out the code definition.

6. By searching online, you can check for a step-by-step diagnostic guide to find the exact nature of the problem, and determine if this process is something you are capable of doing.

7. After the repair is completed, turn the key on again with the engine off. Push the “Erase” button or choose the “Erase” option. And then the OBD Ⅱscanner  will erase the codes and turn the light on the dash off until the next failure.