Adblue removal systems also disables lights and indicators on panels. Most of the removal techniques offers some way to re-enable Adblue easily. Removal of Adblue is not illegal but it is bad for the environment and It reduces engine class to Euro3.
Can you run an engine without AdBlue?
What happens if an engine runs without AdBlue? Running out of AdBlue will not cause your engine to stop working, but it will result in an increase of NOx emission. Some modern systems will limit engine power to comply to emission standards without AdBlue.