BRobertson Posted January 20 Share Posted January 20 When I was driving today an electrical fault popped up showing a yellow icon of the battery. After another few miles, a red warning light Drive System Malfunction popped up and the car lost all power. I immediately turned off the engine and restarted it. It started fine but after I drove about 10 yards the drive system malfunction kicked in again and lost power. This happened a couple of times. I eventually managed to crawl it (keeping under 10mph) to a safe place to stop. Does anyone have any ideas what the cause is? Quote Link to comment Share on other sites More sharing options...
Magnet Posted January 20 Share Posted January 20 Worth getting the battery efficiency checked, together with the alternator output, as a process of cost effective elimination. Kind regards, Gareth. Quote Link to comment Share on other sites More sharing options...
Steve Q Posted January 20 Share Posted January 20 I'd recommend a diagnostic check to see if any fault codes flag up. If you take it to Audi I'd expect to see some form of good will on the repair despite being out of warranty Quote Link to comment Share on other sites More sharing options...
MikeSwidz Posted October 18 Share Posted October 18 I too have a 2019 A8 TDI and have experienced exactly that same fault - yesterday. Initially the YELLOW "Electrical Fault" came up, then within a few minutes a cascade of other warnings about other driver related facilities becoming unavailable and eventually the RED warning light instructing me to pull over and stop. I duly did and the vehicle totally shut-off. Even the central locking had packed in and I was not able to get out of the car. I tried to restart the engine and just had a rapid clicking response. The entire system was dead. Like you after waiting a few minutes the car display kicked in and I was able to restart the engine - however I did not attempt to drive off as I was about to hit the M25 and I did not want to breakdown there !!! The AA eventually recovered the vehicle and delivered it to my local Audi Garage. They are puzzled as the diagnostics did not flag anything up. There next course of action is to do a system software update - await an update. I did not expect something like this to occur on an Audi A8. A bit scary as I frequently take the car for European holiday tours. Last thing I want is something like this to happen whilst abroad. Watch this space for any updates. Quote Link to comment Share on other sites More sharing options...
Magnet Posted October 18 Share Posted October 18 Welcome to the Audi Owners Club ! Good to have you onboard. Hello Mike, Have you, the AA or the Audi dealership confirmed the battery tests as being efficient for its purpose? Kind regards, Gareth. Quote Link to comment Share on other sites More sharing options...
MikeSwidz Posted October 19 Share Posted October 19 Yes. The initial AA Roadside assistance tested the battery and alternator and all was OK. The vehicle was transported to my local Audi Garage and diagnostics were ran. It was determined that a software update was required for the generator system. Unfortunately the effectiveness of this fix will not be known until I have driven the vehicle repeatedly and covered a few hundred miles. I now have the car back and will be somewhat nervously monitoring for any warning "pings". 1 Quote Link to comment Share on other sites More sharing options...
Steve Q Posted October 19 Share Posted October 19 Keep us posted on how you get on Quote Link to comment Share on other sites More sharing options...
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