Most code scanners are designed to work with vehicles made after 1996 that use the OBD2 system. To check compatibility, look for your car's make, model, and year in the product details or packaging. If your vehicle is a heavy-duty truck or uses diesel, you may need a scanner that supports those specific systems. When shopping online, you can also review the product description for supported vehicle types. If you're unsure, consult your vehicle manual or reach out to the manufacturer for more details.

A car code scanner lets you read and clear diagnostic trouble codes (DTCs) from your vehicle's onboard computer.

• Check why your check engine light is on
• View real-time sensor data
• Monitor emissions readiness
• Access information about your car's systems

Many Bluetooth code scanners require a compatible app on your smartphone or tablet to display diagnostic information.

• Check the product details for app requirements and supported devices (iOS or Android)
• Some scanners come with a free app, while others may suggest third-party options
• Follow the included instructions to download and connect the app to your scanner

Getting started with a code scanner is usually straightforward:

1. Turn off your vehicle and locate the OBD2 port, typically under the dashboard
2. Plug in the scanner or connect via Bluetooth if it's wireless
3. Turn on your car's ignition (engine off or running, as directed)
4. Follow the scanner or app prompts to read codes or view data

Many code scanners allow you to clear diagnostic trouble codes, which can turn off the check engine light.

• After reading and addressing the cause of the code, use the scanner's "clear" or "erase" function
• Keep in mind, if the underlying issue isn't fixed, the light may come back on
• Some advanced scanners also reset other warning lights, like oil or brake indicators