Thruxton Fault Code P1576

Hi all
On the way back from today’s ride out the Engine Management light came on on my 2017 Thruxton R. Was shortly after filling up.
Rode back about 80 miles without any problems, checked it here and the code is P1576.
Does anyone know what this means or have access to a list of fault codes?
On the journey back it wouldn’t change from Road to Sport but oddly it would when I was back home so maybe not at all related to the fault code.
Thanks in advance

 

Thanks, internet search this morning also indicated something to do with light circuits......as well as saying that if everything works then don't worry, just clear the code and carry on regardless