2012 Audi A7

Check engine light just came on, car drives and works fine don’t know why it is on 2012 Audi A7 3.0 Supercharged hatchback has 172k miles runs and drives has a lot of maintenance done list: pcv collant oil separator, thermostat, water pump, front collant cross pipe, cylinder head temp sensor, oil drain plug, air and cabin filter, both Camshaft Adjuster Valve Seal, secondary air pipe (under pcv seperator under supercharger), and more maintenance done ansd stuff replaced also, car is salvage title due to minor from end damage nothin affected to car performace asking $7,800 or best offer thanks Prende Luz de motor todo travaja en carro nada a cambiado no se que es de la luz 2012 Audi A7 3.0 Supercargado tiene 172 mil millas corre tiene muncho mantenimeinto hecho al carro lista arriba es titulo salvaje por un choke de enfrente nada de Dano al funcion del carro estoy pidiendo $7,800 o mejor oferta gracias