I left the scanner plugged in my car. Now it would not connect.

If you've left your scan tool plugged in your car, the device may need to be replugged on and off a vehicle’s OBD2 port to wake it up if it goes into low power mode and if it does not connect automatically. This is standard for our OBD2 ELM327 Bluetooth device, and is not an indicator of a faulty scanner. Alternatively, you may need to unpair the device from Bluetooth settings, restart your phone/device, pair again then connect in app to get it working, if you choose not to plug and unplug.

You can leave this OBD2 Bluetooth device plugged in as it consumes only very minimal power when in sleep mode. However if you are parking your car up for a month or more we suggest you take it out. Also, when leaving it in the car, make sure there are no mobile devices with Bluetooth on that may communicate with the scan tool as this would stop the scan tool from going into sleep mode.