Hello. My name is Mark and I will assist you with this.
I would advise you have it checked as soon as possible.
This could be a partially blocked dpf (Diesel Particulate Filter).
This is located in the exhaust system.
Normally it would clean itself when you are driving at speed on a motorway.
If it doesn't regenerate then it can become blocked and cut the engine power. If it becomes severely blocked then it might need to be replaced which can be expensive.
Having the car connected to a scan tool should indicate the cause of the fault.
it has been suggested that if i switch on and while the engine is running in neutral, if the antipolution fault message is not maintained i need not be concerned. is that correct?