Auto scanners

An OBD-II scanner plugs into the diagnostic port and lets you read trouble codes, monitor live sensor data and clear the Check Engine light—all from your phone, tablet or laptop.

Main categories

1. Wired USB/Type-C – rock-solid PC connection for deep diagnostics.
2. Bluetooth adapters – pair with Android/iOS apps such as Torque, Car Scanner, OBD Fusion.
3. Wi-Fi adapters – ideal for iOS devices that lack classic Bluetooth SPP.
4. Hand-held scanners – built-in screen, advanced functions (ABS, SRS, DPF reset).

What to look for

• Protocol support – CAN, ISO 9141-2, KWP2000, J1850 PWM/VPW.
• Interface – USB, Bluetooth 5.0 or 2.4 GHz Wi-Fi.
• App ecosystem – free updates, multi-language UI.
• Extras – data logging, service-interval reset, graphing.

Investing in a scanner saves diagnostic fees and helps you catch issues early, keeping your vehicle healthy and road-ready.