Audi TT Dashboard Warning Lights - DASH-LIGHTS Audi TT Dashboard Warning Lights The first generation (Mk 1) Audi TT was released in 1998 with the second generation (Mk 2) following in 2006. In 2014 the third generation (Mk 3) of the Audi TT was released. These Audi TT dashboard warning lights cover both the Mk 2 and Mk 3, though many of the warning lights should also apply to the Mk 1. Audi TT Mk1 Car Warning Lights - Diagnostic World Audi TT Mk1 EPC warning light - the EPC symbol lamp means that there is a fault within the engine of your Audi TT and should be diagnosed as soon as possible. The fault could be anything from a faulty sensor or ignition coil to a timing issue.