One problem related to warning light on has been reported for the 2012 Audi A6. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Audi A6 based on all problems reported for the 2012 A6.
Takata recal. . . . This was taken to dealer in 2015 for the recall and fixed. Recently the air bag warning light came on and remained on. I took it to the dealer and was told the recall was for the ocd, not the module. . . . They found a "faulty control module". The module is part of the abs system. The abs module and the airbag control model communicate together. I believe this should be a part of the recall on the airbag system. The module has been reset for now. . . . . To replace. . . . . That part costs $1456. 00.