Audi A6 Cruise Control Failure with Check Engine Alert

I experienced similar symptoms on my 2015 Audi A4 2.0 TFSI. The cruise control failure combined with check engine light pointed to a wiring harness issue between the control module and steering wheel controls. The problem was traced to corroded connectors at the steering column, where the cruise control wiring interfaces with the main harness. The speed sensor readings were normal, but the cruise control module wasnt receiving proper signals due to the bad connection. The repair required removing the steering wheel and airbag assembly to access and replace the damaged wiring connector. Though not a major mechanical issue, it needed specialized diagnostic equipment to properly identify the fault codes and verify the repair. First steps should include checking the fuse box for any blown fuses related to cruise control circuits. If fuses are good, the issue likely requires professional diagnosis with a VAG-compatible scan tool to read the specific fault codes from the control module. Given the low mileage, this could be covered under warranty if the vehicle history is properly documented. The dashboard light indicates this needs proper diagnosis rather than trial-and-error repairs.

Thanks for sharing your experience with the cruise control and wiring issues. My problem was exactly the same, including the check engine light and cruise control failure. The clock spring connectors turned out to be the main culprit in my case. I am wondering how much the repair cost you in the end and if any new problems showed up after fixing those corroded connectors? After my repair I noticed my brake lights were acting up for a few days but then it resolved itself.

Following the mechanic visit, my cruise control issue was completely resolved for 95 Euro. The problem turned out to be a faulty pedal switch connection that was causing the cruise control malfunction. The dashboard light cleared immediately after the repair and has stayed off since then. Unlike your experience with temporary brake light issues, everything worked perfectly after the fix. The mechanic explained that the throttle position sensor was receiving proper signals again once they repaired the damaged cable connection in the fuse box area. The repair actually cost less than initially expected since it was just a connection problem rather than needing to replace the entire wiring harness. No new electrical issues have surfaced in the months since the repair, and all steering wheel controls are functioning normally. For anyone else facing similar symptoms, having proper diagnostic equipment to pinpoint the exact connection fault saved both time and money compared to replacing parts through trial and error.

Thanks for the helpful advice. I finally got my car fixed at a different mechanic who specialized in electrical issues. The total repair came to 180 Euro, which included diagnosing and fixing the corroded clock spring connectors. They also found and replaced a blown fuse related to the cruise control system that my previous mechanic had missed. The throttle position sensor was tested and showed normal readings once they cleaned all the connections. The dashboard light cleared right after the repair and the cruise control works perfectly now. No more electrical gremlins or brake light issues either. The new mechanic took time to explain everything and showed me the damaged parts, which made me feel much better about the whole experience. The best part is the repair took only 3 hours instead of the 2-day estimate my old mechanic gave. Really glad I switched to someone who knew exactly what to look for rather than just guessing at the problem.