Polo TDI Cruise Control Failure After Repair Work

Had the same malfunction with my Golf 1.9 TDI from 2013. The cruise control suddenly stopped working and the steering wheel buttons became unresponsive. After professional diagnosis, it turned out the cruise control actuator had a damaged wiring harness. The problem was traced to the connector pins in the fuse box under the dashboard, which had corroded over time. The mechanic found multiple cable connections that needed cleaning and reseating. This is typically not a DIY fix since it requires proper diagnostic equipment to identify the exact fault codes and verify the repair. The issue can potentially affect other electronic systems if left unchecked, as corroded connections in the fuse box can cause various electrical malfunctions. The repair involved: Full diagnostic scan, Removing dashboard trim, Accessing and cleaning fuse box connections, Replacing damaged wiring sections, Testing cruise control functionality Would strongly recommend getting it checked by a qualified technician, as faulty electronics can lead to more serious issues if not addressed properly. Choose a workshop that specializes in VW electronics, as they will have the correct diagnostic tools.

Thanks for sharing your experience. That sounds exactly like what I am dealing with. The cruise control issue and error message match perfectly with what happened to your Golf. This gives me a good starting point, though I am a bit concerned about potential throttle body issues as well, since I noticed slight hesitation during acceleration recently. Before I head to a new mechanic, would you mind sharing how much the repair ended up costing in your case? Also, has everything worked properly since the fix, or have you noticed any other electrical gremlins popping up? I am particularly interested if the diagnostic scan revealed any additional problems that needed attention while they had the dashboard apart. This will help me budget for what might be ahead.

After my recent visit to the mechanic, I can confirm that fixing the non-functional cruise control turned out to be a straightforward repair. The total cost came to 95€, which covered the diagnostic scan and repair of a faulty connection near the fuse box. Since the fix, the cruise control has worked flawlessly with no electrical issues whatsoever. The steering wheel controls are now fully responsive, and all warning messages have cleared from the dashboard. The diagnostic scan actually revealed no additional problems requiring attention. Regarding your concern about the throttle body and acceleration hesitation, this was not related to the cruise control issue in my case. However, these symptoms might warrant a separate inspection, as throttle body problems can develop independently from electrical system faults. The repair was much simpler than initially feared, involving mainly the cleaning and reconnection of components rather than replacing entire units. All functions have remained stable for several months now with no recurring problems.

I took your advice and visited a certified workshop specializing in car electronics. The experience turned out much better than expected. The diagnostic scan showed a damaged connection in the cruise control actuator circuit, similar to your case. The technician worked efficiently, cleaned the corroded pins in the fuse box, and replaced a small section of wiring. The malfunction was resolved completely within two hours. The total repair cost was 120€, including the diagnostic scan. While they had the dashboard apart, they checked the throttle body and found it working normally. The slight hesitation during acceleration was actually due to a loose vacuum hose, which they fixed at no extra charge. The cruise control now works perfectly, and all error messages have cleared. No other electrical issues have appeared since the repair. Really glad I avoided my previous mechanic and found a proper specialist for this type of non-functional electronic system.