So far, I have not seen any indication of a yellow flag to indicate an incident ahead in the sim. Not even in the HUD and much less animations of marshalls waving the flag or LED panels flashing in some tracks that have these panels. I have already caused a pile-up on purpose just to see if there was any indication of a yellow flag, but nothing came up. There is also no indication of blue flag to let cars in a lap ahead to pass. The only flag that is shown in the hud is the green flag, when the race starts and sometimes when I get past an incident on track, without showing the yellow flag before. I don't know if this is a bug, a configuration problem or basically the sim doesn't have this feature.
There is a option in the Game Settings to turn on "Flags & Penalties". I use CrewChief and it always gives me audible for Yellow Flag.
I only get yellows in SP when I do stupid myself, but no yellows from AI, etc. In MP all flags work like intended.
I turned it on, but only shows the blue flag. Still no yellow flag in Single player mode. I'm also using Crew Chief, but the spotter gives me no indication of yellow flag, even though I use the spotter's options to warn about a yellow flag in any sector. Could you show me your AMS2 and Crew Chief settings to see if I'm doing something wrong?
As far as I know, in AMS2 there only is the one option to enable or disable Flags. I have Crew Chief basically in default. Flags all enabled. When you setup your race, do you enable everything in "Rules and Regulations"? It is on top from the main screen for the Single Race.