VW Caddy Cruise Control Failure: Electronic System Alert

I had a very similar issue with my 2015 VW Golf. As someone with moderate car electronics experience, I recognized these symptoms immediately. The diagnostics showed error codes related to the cruise control actuator and speedometer signals. After some basic troubleshooting, I took it to a workshop where they found a faulty cable connection near the throttle body control unit. The plug had worked loose over time and was causing intermittent signal issues. The repair was straightforward, they cleaned the connection points, secured the plug properly, and cleared the error codes. Total cost was 95€ including diagnostics. Since the fix, all systems have been working perfectly. What engine type does your Caddy have? Also, when you mention error messages, are they constant or do they appear intermittently? These details would help identify if your issue matches what I experienced. Before taking it to a workshop, you might want to check if the error persists after disconnecting the battery for 10 minutes, this sometimes resets non-functional electronics. However, given the multiple symptoms, it likely needs professional diagnostics to properly identify the root cause.

Thanks for your detailed reply. I have the 1.4L TSI gasoline engine with 109814km on the clock. The error messages appear intermittently, usually after driving for about 15 minutes. The steering wheel controls for the cruise system become unresponsive, and the speedometer display flashes briefly before showing the error. I checked the fuse box and all relevant fuses appear intact. Interesting that you mention the throttle body connection, did your workshop mention if this is a common failure point? Will try the battery disconnect suggestion before booking it in for diagnostics. Has anyone else experienced similar issues with the actuator connections on these models? Starting to suspect it might be more than just a loose plug in my case since the problems seem to worsen with engine heat.

Thanks for those additional details about your Caddy, the symptoms you describe are indeed very similar to what I experienced with my Golf, especially the timing of when the errors appear. In my case, the heat-related issues were also present, which actually helped the workshop pinpoint the problem. The throttle body connections are known to be sensitive to heat cycles, and the wiring harness near the actuator can become brittle over time. When my workshop did the diagnostics, they mentioned seeing similar issues across several VW models from that era. The combination of speedometer errors and cruise control failure often points to the actuator circuit, especially when the problems worsen with heat. The fuse box check was a good first step, but these issues typically stem from wiring or connection problems rather than blown fuses. In addition to the loose plug I mentioned before, they found slight corrosion on the actuator connector pins, which was contributing to the intermittent nature of the problem. Since your mileage is similar to what mine was when the issue occurred (mine was around 98000km), it might be worth having the workshop specifically check the wiring harness near the throttle body and all associated actuator connections. The diagnostics should quickly confirm if its the same underlying issue.

Based on your explanation and the symptoms you described, I suspect my Caddy is suffering from the same malfunction. The connection between heat and system failures makes a lot of sense now. I tried the battery disconnect method but the steering wheel controls are still unresponsive after 15 minutes of driving. Going to book it in for professional diagnostics next week and will specifically ask them to inspect the actuator connections and wiring harness near the throttle body. Really grateful for sharing your experience, saved me some guesswork and potentially unnecessary parts replacement. Will update the forum once the workshop identifies the exact cause. Good to know these electronics issues are somewhat common and hopefully fixable without major expense. Just curious, did your repair shop recommend any preventive measures to stop the problem from recurring? Since the fuse box check revealed nothing obvious, I want to make sure we address the root cause properly this time.