Acuras equipped with maintenance mindertm measures driving style road conditions and helps to notify you when scheduled maintenance is due when you see the wrench its time for acura genuine service. What is code a12 on a 2007 acura tsx service asked by wiki user 0 1 2 see answer top answer wiki user answered 2013 11 29 235735. It is an oil change and oil filter a tire rotation and air filter change a12 means the a1 and a2 services are due hence a12. What do acura service maintenance codes mean view pre owned inventory contact us what do the acura service maintenance codes mean main code maintenance needed a replace engine oil b replace engine oil oil filter inspect front and rear brakes check parking brake adjustment expiry date for tire repair kit tie rod ends steering