Audi Q8 Power Steering Failure Warning Signs

I had a very similar issue with my 2019 Audi Q7 last summer and can share my experience. I have some basic car maintenance experience, but steering systems require professional expertise. The symptoms you describe match what I experienced, the power steering issues and vibrating steering wheel were particularly concerning. The electric steering system in these models can develop connection problems that create these exact symptoms. In my case, the workshop diagnosed a faulty cable connection to the power steering control module. The steering rack was fine, but the connection issue was causing the system to malfunction. They performed a complete wheel alignment after fixing the connection to ensure everything was properly calibrated. The entire repair took about 3 hours and cost me 95 Euro. Given your symptoms, I would strongly advise against driving the vehicle until its checked. Problems with the steering system can become dangerous, especially at higher speeds. To provide more specific advice about your situation, could you share: Have you noticed any unusual noises when turning the steering wheel? What exact error code is showing? Did this start suddenly or develop gradually? Has the vehicle had any recent maintenance or repairs?

Thanks for the detailed response. The steering issue indeed started suddenly during highway driving. Just to clarify my situation: last service was done at 15000 KM, about 2 months ago. When turning the wheel, there is a noticeable whining sound coming from the direction of the steering pump. The error code displayed is P0868. The steering wheel gets particularly stiff during slow-speed maneuvers, like parking. The steering rack seems to be the main concern, as the resistance is not consistent when turning. The pressure hose appears intact from visual inspection, but I notice some wetness around the connections that might indicate a leak in the power steering system. Based on your experience, would you say this is likely a major repair requiring steering system replacement, or could it be resolved with a simpler fix like yours?

Thanks for providing those additional details. The symptoms youre describing sound more severe than what I experienced, particularly that whining noise and the wet spots around the connections. The error code P0868 typically indicates a power steering fluid pressure problem, which aligns with what youre seeing. The inconsistent resistance in the steering rack and the whining noise from the steering pump area suggest this could be more complex than the electrical connection issue I had. It sounds like you might be dealing with a failing power steering pump or a significant fluid leak in the system. Looking back at my repairs over the years, Ive noticed that steering system issues often cascade, a small leak can quickly lead to pump damage if not addressed. While my repair was relatively simple, your symptoms point to a potentially more involved fix, possibly requiring steering pump replacement and a thorough check of the entire power steering system. The wetness you mentioned around the connections is particularly concerning. When my steering rack was serviced during the electrical repair, the technician explained that even small leaks can cause significant steering problems and should be addressed immediately. Given these symptoms, Id strongly suggest having it towed to the workshop. The repair costs will likely be higher than my 95 Euro electrical fix, but preventing further damage to the steering system components is crucial. Would you mind checking if the power steering fluid level is low? This could help confirm if its primarily a leak issue.

Based on your detailed explanation and experience with your Q7, I appreciate the insights. I just checked the power steering fluid level and its significantly below the minimum mark, which seems to confirm the leak theory. The whining noise from the steering pump has actually gotten louder since my last post, and the steering wheel becomes increasingly difficult to turn after driving for about 15 minutes. The wetness around the power steering connections has also spread, suggesting an active leak in the system. After hearing about the potential for cascading steering system damage, I wont risk driving it further. Ive already arranged for a tow truck to take it to the workshop tomorrow morning. While Im hoping its just a severe leak that can be fixed without replacing the entire steering pump, Im preparing for a potentially bigger repair bill. The inconsistent resistance in the steering rack really concerns me, so getting it fixed properly is worth the cost. Thanks for helping me understand the severity of these symptoms. Ill update once I get the diagnosis from the workshop.