Mine comes on all the time, though only when I stop. Never when I'm moving.
TF 160 VVC here.
and i can vouch for it being astonishingly loud!!! put it this way it could be herd over a TT mk3 and Janspeed De-Cat!........ well on idle anyway
Good to know it works! One thing less to worry about.:rolleyes2:Now I have tested it and know it works I have to say I can barely hear it over my D&T exhaust even at idle.
Craig