A best car code reader can pay for itself in fuel and time saved by avoiding trips to the auto parts store for a free code read. Consider the level of diagnostics you require: Some models offer a full range of readings and tests, while others have special features such as emissions testing or battery-drain protection. Also look for an easy-to-navigate interface and a comprehensive code library that clearly explains problems.
To determine which car code reader is the best, we tested a wide selection of Bluetooth- or Wi-Fi-connected devices that connect to your smartphone, tablet or computer via wireless technology. Our testers plugged the scanners into cars with known faults that would trigger a check engine light and used the recommended app to diagnose them. Some models can also clear engine codes (which turns off the check engine light).
Revolutionizing Diagnostics: The Top Features of the Best Car Code Readers
The Autel MaxiCOM MK808 was our top pick for Bluetooth- and Wi-Fi-enabled scanners, thanks to a large display and user-friendly interface. This model has extensive support for American, European and Asian makes and can be used with a variety of apps for specialized functions. It can even perform tests that other scanners cannot, like component and sensor data streaming, freeze-frame information and performance analysis.
If you prefer a handheld device, the Motopower MP69033 is our recommendation. This basic model hooks up to your vehicle’s OBD port and retrieves engine codes that set off a check engine light. It can also display live sensor data for a real-time view of the vehicle’s run condition. It’s not as easy to use as the other Bluetooth scanners we tested, but it’s still a great value.