I have a 2020 NV300 145dci which has the engine management light on 'check anti pollution system'despite my local garage stating on the diagnostic machine no fault code is showing. 

Has anyone else had a similar issue? 

 

Sounds like it needs a good blast up the motorway to clear any carbon build up in the engine

Hi Trevor, blasting didn't work so took it to the local Nissan Dealership. They identified a problem with the Ad-blue system and replaced the tank and pump on warranty. Did a great job. 👍

Thats a good result for a cost free warranty job