Skip to Main Content Skip to Footer Links
Error occured! Please reload the page and try again
Choose a Store
Open till 
There are vehicles in your garage

Free shipping on orders over $25.

Enroll in Speed Perks for more savings.

Cart is empty!

Add Something to the cart

includes estimated shipping

Vehicle added


Find parts for the selected vehicle:

View Vehicles
Are you sure you want to delete this vehicle?

    Add a

    Add a

    Diagnostic Tools

    The days of popping the hood and doing a quick diagnosis on your vehicle are, for the most part, finished. Instead, today’s vehicles are governed entirely by the engine and drivetrain computer. Diagnostic tools are designed to bridge the gap between you and this system.

    When the engine computer detects a reading from a sensor that is outside of normal specs, it stores a trouble code in the computer and lights the dashboard Check Engine light (CEL). From there, it’s a matter of using a scanner or other diagnostic tool that can indicate the trouble code(s). The code will at least point you in the right direction after you look up its meaning.

    There are a number of these kinds of tools that you can use for diagnostics. Determining which to invest in depends on how much know-how you have with cars. If you're not an experienced mechanic, you probably won't want to buy a timing light to help set the timing on your older-model engine. On the other hand, diagnostic tools like an ignition tester are pretty straightforward.

    Some of the digital diagnostic machines available today can, after determining the cause of a problem, provide you with a solution drawn from a database that includes information from -- no kidding -- millions of previous fixes. If you're more experienced than most, digital multimeters and code readers will help you to translate engineering diagnostic trouble codes (DTCs) into English. What's more, they will reset the computer and turn off your Check Engine light post-scan.

    Our line of diagnostic tools numbers in the hundreds. Some items are even compatible with Bluetooth for wireless connectivity. Others, like the coolant and battery refractometer, sound almost cool enough to buy on principle, just so you can tell your buddies, "This is my new refractometer."

    Read More Read Less

    Sort By


    268 results


    Manage Vehicles


    • Price
    • Price

    End of   Exact Fit  results for your

    Not finding what you need?

    See Non Fitted parts & accessories
    Back to top

    Disclaimer: We strive to keep all information accurate and up-to-date; however, product availability, pricing, promotions and store hours are subject to change without notice. Please contact Customer Care if you have any questions or corrections.