Audi Q4 E-tron Cruise Control Failure Causes Frustration

When my 2020 Audi e-tron GT showed similar symptoms, it turned out to be a faulty throttle body actuator connection. The cruise control malfunction was traced to loose wiring in the connector plug near the steering wheel controls. The repair involved accessing the fuse box to check all connections, then replacing two damaged connector pins. While the symptoms can seem alarming, the underlying issue was primarily electrical rather than mechanical. This type of malfunction typically stems from vibration-induced connector wear or moisture intrusion into the electrical components. The diagnostic system stores these errors until properly cleared after repair. The fix requires specialized diagnostic equipment to pinpoint the exact connection issues, as the throttle body and cruise control systems are interconnected through the vehicle's central electronics. This is not a DIY job due to the complexity of modern vehicle electronics. Though not a severe mechanical problem, it requires immediate attention since cruise control issues can indicate broader electronic control system concerns. A certified technician with experience in electric vehicle systems should handle the repair. Be sure to get a complete diagnostic scan and have all stored error codes properly documented before any work begins.

Thanks for sharing your experience with the throttle body issue. My faulty system symptoms were nearly identical. The steering wheel controls and cruise malfunction really had me worried at first. Did you remember the repair cost? Also wondering if any related issues came up since getting it fixed? Just want to make sure I budget properly for the diagnostics and potential fixes.

Great to hear back from you. Since having my throttle connection issue fixed at the shop, the cruise control has worked flawlessly with no recurring malfunctions. The repair was straightforward, turned out to be a damaged connector plug that was causing the electronic control issues. The total cost came to 95 Euro, which covered both diagnostics and the repair of the cable connection. Much cheaper than I initially feared, given how the car electronics can be complex in these newer models. Getting the stored error codes cleared from the system and having a proper diagnostic scan done was key. The fuse box connections were also checked as part of the service, which helped ensure no other electronic components were affected. If your symptoms match what I experienced, you should be looking at a similar repair scope and cost. Just make sure to mention the cruise control malfunction and error messages when you take it in, as it helps pinpoint the issue faster.

Thanks everyone for the great advice. I took my Q4 to a certified shop that specializes in vehicle electronics. The diagnostics confirmed the non-functional cruise control was caused by a faulty connection in the throttle body wiring. The technician found moisture damage in one of the main connectors and traced it back to the fuse box area. The repair involved replacing the damaged wiring harness and connector pins. Total cost came to 180 Euro including the full diagnostic scan. Been driving for two weeks now with no error messages or cruise control issues. The shop did a thorough job documenting and clearing all the stored error codes. While it was stressful initially, I am relieved it turned out to be a relatively straightforward electrical fix rather than a major mechanical problem. For anyone else facing similar symptoms, getting proper diagnostics from a qualified shop is key. The investment in finding the root cause saved me from potentially bigger issues down the road.