One problem related to check engine light on has been reported for the 2013 Audi A8. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2013 Audi A8 based on all problems reported for the 2013 A8.
The check engine light came on and I drove a very short distance to return home during which odd noise came from the engine. Diagnostics show that one of two turbos failed due a failure of the lubrication system for the turbos.