Turn on the Bluetooth on the phone.
In the phone Bluetooth settings, connect to the "OBDII" device with the password (PIN) "1234".
If the phone doesn't see " OBDII" device, try to plug the OBD device out of the car's socket and plug it in again.
Download "Car scanner" app:
In the app, connect to the "OBD" device.
In the app, press "Engine codes".
- switch the phone
- switch the OBD device
- reboot the phone
- plug out and plug in the OBD device
- make sure the car engine is on