Code Reader

When you detect there's a problem with your vehicle, turn to AutoZone to help you pinpoint the issue. With our wide variety of code readers, you can get to the root of the problem in no time. Our OBD2 scanners and other diagnostic tools also help you keep track of your previous vehicle repairs. Next time your engine throws a code, turn to AutoZone for an easy-to-use code reader or diagnostic tool.

A broken down car is nothing but a bummer - even worse, waiting on a mechanic is also a pain. Easily diagnose your car problem with code readers and diagnostic tools from AutoZone. With our variety of code readers, you can find the perfect one that will accurately operate for your vehicle.

Code readers help to diagnose issues by accessing your car's on-board diagnostic system (OBD), a system which logs error codes based on the readings from your vehicle's engine sensors. These sensors are constantly getting readings for temperature, fuel, oxygen, and more, and all of this information is fed into your engine computer. As a result, the engine computer has enough data to determine when something is wrong with the engine (and some other systems, depending on the vehicle). When the computer determines that something has gone wrong, it logs a diagnostic trouble code and turns on the check engine light, letting you know that you can scan for the code with your code reader.

Whether you need a car code reader for Mustang, your Toyota Tacoma or a car code reader for Honda Accord, we have your back. Let AutoZone point you in the right direction when it comes to diagnosing your ride's problem. Choose Same Day Store Pickup to expedite the process. When you arrive to your local AutoZone, you're always greeted by our friendly staff, who are knowledgeable and ready to assist you with any question you may have regarding your vehicle complications.