Audi Q5 Cruise Control Failure: Fix Guide

Had similar issues on my 2011 Audi Q7 3.0 TFSI. The symptoms matched exactly, cruise control failure combined with speedometer errors. Initial diagnostics pointed to a faulty connection between the throttle body actuator and the main control unit. The root cause turned out to be corroded wiring connectors near the throttle body. The connections had deteriorated over time, causing intermittent signal issues. While the throttle body itself was functioning correctly, the poor connection was causing the car electronics to receive inconsistent readings. This was not a major repair but required careful troubleshooting. The repair involved cleaning the connections, replacing the damaged wiring section, and recalibrating the throttle body position sensor. After fixing the connection issues, the cruise control and steering wheel controls returned to normal operation. Worth noting that similar symptoms can also be caused by a failing throttle position sensor or cruise control module, but checking the wiring connections should be the first step since its less invasive and more common. Consider requesting a thorough diagnostic scan focusing specifically on the throttle body and cruise control systems before any parts replacement.

Thanks for sharing your experience with the faulty system. The symptoms with my Audi Q5 sound identical, especially the non-functional cruise control and error messages. Good to know it was just wiring in your case rather than a complete actuator replacement. Did you recall the total repair cost? Also curious if youve had any recurring issues since the fix or if the steering wheel controls have worked perfectly? Im trying to budget for the worst case but hoping its just connection problems like yours.

Just wanted to follow up on my earlier post about the cruise control issues. After seeing the mechanic, they confirmed it was indeed a faulty system caused by damaged wiring connections, just like I suspected. The repair cost came to 95 Euro, which covered fixing the defective cable and plug connections near the throttle body. The car electronics have worked flawlessly since the repair. The cruise control functionality was completely restored, and all steering wheel controls are operating normally. No recurring issues in the past months, which confirms it was purely a connection problem rather than a more serious component failure. Its worth mentioning that addressing these non-functional electrical issues early can prevent more expensive repairs down the line. Having the mechanic focus on checking connections first, before replacing major components, definitely saved money in this case.

Thanks for the helpful advice. Just wanted to close the loop on my Audi Q5 cruise control situation. Finally got it fixed last week and thought Id share the outcome. Took it to a different mechanic who specializes in car electronics. Their diagnostics revealed corroded wiring harness connections, similar to what others described. The total repair came to 180 Euro, which included cleaning all connections, replacing a small section of damaged wiring, and running a full system check. All cruise control functions are now working perfectly. The speedometer error messages have disappeared and the steering wheel controls are responding normally. The mechanic explained that moisture had gotten into the main wiring harness over time, causing the malfunction in multiple systems. Much relieved it wasnt a complete throttle body replacement or major electrical overhaul. For anyone facing similar issues, definitely worth having the connections checked first before replacing expensive components.