Warning light on dashboard

[Basa]

My 2016 Peugeot 2.2 Elddis recently had the little triangle warning light come on but no other information displayed on the dashboard?
The manual says go to man in dealer and tell them what was displayed on dashboard, obviously I had nothing
OBDP reader read no faults?
I reset it anyway and when I started up the warning light had gone
Any idea’s greatly appreciated
Basa

 

[Fazerstorm]

Ours lights up on our 2014 boxer when we have the tow bar electrics connected and put the van in reverse. It is to warn we have no reversing sensors operating, due to the bike rack on the tow bar. It did take a while before I realised that was why it was lighting up though. It is a different warning to the engine fault one, which can be more serious.