Obd Arny is the simplest car scanner which works according to OBD2 standard. Attention! You need ELM327 Bluetooth or Wi-Fi adapter to connect to a car. Your vehicle should be OBD2 compatible. ELM adapters version 2. 1 are often can be corrupted, so try to choose version 1. 5 if you have a chose. How to start. Download Obd Arny; - Turn On Bluetooth;