How to Get a Free Diagnostic Test for Your Car

By | March 9, 2023

How to get a Free Diagnostic Test for Your Car
There are a few different ways you can get a free diagnostic test done on your car or truck.

All vehicles from 1996 and newer have an OBDII port under the dashboard that, with a scan tool, can read engine codes.
How to Get a Free Diagnostic Test for Your Car 2020
The OBDII port, along with an OBDII scan tool, is the main way to troubleshoot a vehicle and find out what problems it may be having.

Many vehicles also have built-in diagnostics for basic troubleshooting.

Below are the best options to get a free or low-cost diagnostic scan of your car or truck.

3 Ways to Get a Free Diagnostic Test for Your Car

  1. Auto Part Store
  2. How to Get a Free Diagnostic Test for Your Car Auto Part Store
    Most auto parts stores will use a scan tool to read an engine error codes for free.

    Be sure to call around first, but it is common for auto part stores to do a free test as a way to bring in customers.

    Auto Zone has been particularly ready to do a scan, at least in my area.

    Each store is likely different since they will be different employees.

    Simply be sure to call the stores closest to your location before going.

  3. Vehicles Built-in Diagnostics
  4. How to Get a Free Diagnostic Test for Your Car Vehicles Built-in Diagnostics
    Most all cars and trucks will have a built-in diagnostic procedure.

    For example, most Dodge vehicles will display the error codes when the key is cycled on and off three times and left in the on position.

    The code will display on the dashboard, which can be looked up online.

    Finding the code with the built-in diagnostics is often confusing, but with a little practice can be done.

    Read here to see how to use a Dodge car or trucks built-in diagnostics.

  5. Use a Smartphone Bluetooth OBDII Dongle
  6. How to Get a Free Diagnostic Test for Your Car Vehicles OBDII Dongle
    While this option is not free it is a very low-cost method and a good budget way to scan for engine codes.

    OBDII Bluetooth dongles are very low-cost scan tools, usually less than $10-$15.

    They pair with a smartphone, tablet, or laptop and display the codes as well as other features such as clearing codes.

    These small OBDII adapters take all the expensive components of a classic scan-tool and let a smartphone app do all the work.

    Having your own scan tool is almost a must if you plan on doing any repairs yourself.

    A low-cost Bluetooth OBDII is the cheapest scan tool option available.

    Standalone scan tools are also available but cost more compared to Bluetooth units.

    Read here for more on Bluetooth OBDII scan tools.

How Much Does it Cost to Have a Diagnostic Test on a Car?

A car diagnostic test can vary but is often free at some locations.

For example, many Auto Zone stores will scan a vehicle onboard computer for free which can tell a user what the problem is.

Many mechanic shops will also scan for free but be sure to call around first to be sure which will.

Finding the problem with your vehicle doesn’t require an expensive scan tool with a few options to get it done free or close to it.

If you have a few dollars to spend an OBDII Bluetooth dongle is a very good option.

A vehicle’s built-in diagnostic is also good once you get used to how it works; every manufacturer has a different built-in diagnostic function.

As long as the car is still running, taking it to an auto part store and letting the employees scan it is also free.

Do you have any ideas for getting the codes on a car scanned for free? Let us know in the comments below.

Bob Thomas

3 thoughts on “How to Get a Free Diagnostic Test for Your Car

  1. Gary Dawson

    Are you aware of any shops in Denver, CO that will do a free diagnosis on my 2013 Ford focus? It’s not a code problem it’s making a weird noise that I can’t figure out & I’m trying to find a free diagnosis & reasonable repair rates. Thank you!

  2. joey

    Were can i get a free diagnostics test at on my 1987 Dodge Dakota i live in highland il 62249


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