Audi Q3 Cruise Control Failure & Warning Messages

As someone with some technical experience, I had a similar issue with my 2017 Audi Q5, which shares many electronic components with your Q3. The symptoms you describe match exactly what I experienced, cruise control malfunction and warning messages. In my case, the problem was traced to a faulty connection between the throttle body actuator and its wiring harness. The system triggers these warnings when it detects inconsistent signals from the actuator. The workshop found corroded pins in the connector, which caused intermittent communication issues. The repair involved cleaning the connector and replacing the damaged wiring section. Total cost was 95 Euro for parts and labor. After the fix, all systems returned to normal operation and the cruise control worked perfectly again. For a more accurate diagnosis, could you share: What specific error codes are stored? Does the issue occur more frequently when the engine is cold or warm? Are there any other electrical systems showing unusual behavior? Have you noticed any changes in throttle response while driving? This information would help determine if your issue matches the faulty system I encountered or points to a different component in the cruise control circuit.

Had my Q3 serviced last week at 111955 KM. After a detailed inspection, they found the car electronics were affected by a damaged wiring harness connecting to the steering wheel controls. The issue triggered multiple fault codes and disabled several functions including the cruise control. Labor costs came to 180 Euro plus parts. The non-functional systems were restored after rewiring the affected section. The car is running perfectly now and all warning messages have cleared.

Glad to hear you got the issue resolved. Your wiring harness problem aligns with what we often see in these models, electrical gremlins tend to cause multiple system failures simultaneously. The diagnostic process on my Q5 followed a similar path, though my faulty system was connected to the throttle body rather than the steering controls. These Audi models are quite sensitive to electrical irregularities, which can trigger various error codes and safety shutdowns. The repair cost seems reasonable at 180 Euro plus parts, considering the complexity of accessing the steering column wiring. My actuator-related repair was slightly cheaper because the access was easier. One tip for future reference: regular inspection of visible wiring connectors during maintenance can help catch deterioration before it leads to complete system failure. The cruise control and other electronic features in these cars rely heavily on clean, solid electrical connections. Good to know both our cars are back to full functionality after addressing the root electrical causes. These experiences show how important proper diagnostics are in pinpointing the exact source of electrical issues.

Thank you for sharing my results with the Q3 issue. After getting it properly diagnosed, the technicians pinpointed a damaged wiring harness connected to the steering wheel controls as the root cause. This explained why multiple systems were affected and triggered various fault codes in the diagnostics. The non-functional cruise control along with other features were direct results of this faulty system. The repair involved replacing the damaged wiring section near the steering column. Total costs came to 180 Euro for labor plus the parts needed. While not cheap, it was worth fixing properly given how many vehicle functions were impacted. After the repair, all systems are working normally again, no more warning messages and the cruise control operates perfectly. Really appreciate the earlier suggestions about checking connections and fault codes. The workshop confirmed that catching these electrical issues early through proper diagnostics is key to preventing more extensive problems. Now I know to pay extra attention to any steering wheel control irregularities since they can cascade into wider system failures.