In the dashboard section for Errors you can see the IoT errors your vehicles report. Each error code is assigned to specific vehicle number and the vehicle ID. By default there the last 10 errors are shown, the rest will be visible when clicking the Show all button below:

Just copy the vehicle ID, go to Vehicles section and you will find out which IoT IMEI number is installed in the specific vehicle.

ATOM receives these error codes straight from the IoT device without any additional description - as each IoT brand and model has its own error code descriptions, in order to find out the meaning of a specific error code please check your vehicle IoT documentation or check with your IoT manufacturer support team directly, providing the IoT IMEI number and the code visible in the dashboard.