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The Latest in DIY Auto Diagnostics

Computers have the capability to simplify a wide range of complex issues.  In the world of automobile repair, computer diagnostics have simplified the process to one where it is necessary only to interpret a code, not attempt a number of trial and error diagnostic tests.

If your vehicle is experiencing either mechanical or electrical difficulties, you can use an OBD II scanner as a diagnostic tool in order to determine the issue.  OBD II ports have been in operation since 1995, and scan issues where the check engine or other indicator light on the dashboard is lit.  If your car is not equipped with an OBD II port, an OBD I translator can suffice instead.



  1. Ensure that you are using the appropriate scanner for your vehicle.  Keep in mind that there are three different OBD II protocols for different manufacturers.  In order to validate the correct scanner, consult the manufacturer of your OBD II scanner.

  2. Locate your OBD II port, which is usually within reach of the drivers seat.  Look near the fuse box, or under the dashboard.  Once located, it does not require any specially configured tools to uncover it.

  3. Connect your OBD II scanner to your car, and turn it on.

  4. Rotate the ignition key to the accessories position.  Allow a few moments for the OBD II scanner to read the code or codes from your vehicle’s computer.

  5. Perform an online computer search to interpret your code.  This step is only necessary if your scanner does not translate the code for you.

  6. Address the identified problems on your car.  While the OBD II scanner can help you identify the general area where your car has the issue, you will still have to identify the specific component or components that are causing the malfunction.