Diagnostic Tools

Diagnostic Tools

Diagnosing an issue is the first step to repairing your vehicle. The right diagnostic tools can help you narrow down what is causing the problem for a quicker and more affordable repair. Whether you need a scan tool, multimeter, or other diagnostic tool, O'Reilly Auto Parts has you covered.

Scan Tools and Code Readers

One of the most common diagnostic tools used on vehicles today is a scan tool or code reader. Since 1997, vehicle manufacturers have used OBD-II protocols to diagnose vehicle issues. As automotive technology has advanced, the capabilities of scan tools and code readers have grown to allow technicians to diagnose practically every system on your vehicle. Code readers are normally limited to reading and clearing diagnostic trouble codes (DTCs), but many scan tools allow you to dive deeper into what may be causing a DTC on your vehicle. We offer scan tools and code readers for automotive, heavy-duty, agriculture, construction, and other applications to ensure you can find the answer to your repair problems.

Shop the Best Diagnostic Tools

Make diagnosing Check Engine lights and other issues easier with the right diagnostic tools from O'Reilly Auto Parts. We carry tools to help diagnose issues on almost every vehicle system. We also carry the tools you need to complete your repair once you have diagnosed the problem. If you're not comfortable diagnosing your own vehicle or buying a code reader, our stores also offer free Check Engine light testing. Our parts professionals can read the codes stored in your vehicle's computer and provide you with a printout that may help you start your repair.