Your vehicle's on-board diagnostic system stores trouble codes when it detects issues to make diagnosing problems easier. Learn what these codes mean.

Get insights into your vehicle's health by understanding OBD 2 codes. Explore our list of common codes, their meanings, and expert tips for diagnosis and repair.

Decode your car's OBD 2 codes with ease. Learn their significance and save time and money on diagnostics with AutoZone.

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 …

Find the best OBD2 scanner for your vehicle with our 2025 buying guide. Discover the different factors to consider when buying a code reader.

An OBD2 scanner is useful for diagnosing potential problems your with car. Learn how to use it and understand the codes with AutoZone.

When your OBD-II sensor shows trouble code P0121, there may be an electrical issue with your throttle position sensor. Learn how to diagnose this issue and find the correct repair solution in order to …

The P0443 code signals an issue with your vehicle's EVAP system purge control valve. Learn its causes, symptoms, and how to fix it.

When your check engine light is illuminated due to trouble code P0128, you may have an issue with your engine thermostat. Here are some helpful steps to take to find out how do I fix trouble code P0128?

Your dashboard is illuminated with the glow of the check engine light. After checking your codes, you find that the problem is P0410. So, what does the code P0410 mean? What are the symptoms and …