Audi A8 Power Loss: Multiple Fault Codes Trigger Alert

As someone with some hands-on experience with Audi vehicles, I had a similar engine issue with my 2015 Audi A6 3.0T. The symptoms matched yours exactly, poor performance, check engine light, and multiple diagnostic codes in the car computer. After running an auto scanner, my workshop discovered the root cause was a faulty chip tuning installation from a third-party tuning company. The car diagnostic revealed that the aftermarket software was conflicting with the factory ECU settings, causing serious performance issues. The fix involved removing the third-party tune and restoring factory settings, plus some additional diagnostic work to ensure no lasting damage occurred. Total repair cost was 180 Euro, which included the complete system reset and testing. Before suggesting specific solutions, it would help to know: Have you had any recent modifications or tuning done? Which specific diagnostic codes are showing up? When did the symptoms first appear? Does the issue get worse during certain conditions? This kind of engine issue needs proper diagnosis with professional equipment, as DIY fixes could potentially cause more problems with modern engine management systems.

Last serviced at 105427 KM, and wanted to update that I got it checked. The vehicle diagnostics revealed P2015 and P0299 fault codes. The main culprit was a failed intake manifold runner control and a boost pressure issue. The dashboard light was definitely pointing us in the right direction. After replacing the intake manifold and checking the turbo system, the engine performance returned to normal. The car computer now shows no active codes. The repair cost was 850 Euro including parts and labor. Worth mentioning that the check engine light disappeared immediately after the fix. Sharing this might help others with similar symptoms on the same engine variant. Rather than guessing, getting a proper diagnostic scan was key to identifying the exact problem.

Based on your experience, that sounds exactly like what I dealt with on my Audi A6. Those P2015 and P0299 fault codes are pretty common on our 3.0T engines. I remember when my car diagnostics showed these same codes. The car scanner really helped identify the intake manifold runner and boost pressure problems quickly. The repair cost on yours was actually better than what I paid, my total came to around 1100 Euro for similar work. The check engine light issues definitely cleared up right after the fix, just like yours did. A failing intake manifold seems to be a known weak point on these engines. When the boost pressure drops, it triggers those specific diagnostic codes and the reduced engine power mode kicks in as a protection measure. Good call on getting the proper diagnostic scan done first. Unusual parts swapping without checking fault codes usually leads to wasted money and time. The turbo system check was also smart, these issues often appear connected on the 3.0T.

Thanks for sharing those specific fault codes. My 2017 Audi experience really helped me understand this issue better. The scan tool results showing P2015 and P0299 definitely pointed straight to the intake manifold and boost pressure problems you mentioned. I noticed similar sluggish engine behavior before getting mine fixed. Once the technician used a professional auto scanner, it made perfect sense why the check engine light was triggered. The car computer was basically telling us exactly what was wrong. Completely agree about the importance of proper diagnostics. The 850 Euro repair cost seems fair for the work involved. My engine issue ended up being a valuable lesson, when multiple fault codes appear, getting a proper scan is crucial before attempting any repairs. Glad to hear the fix worked and the car is performing normally again. This kind of information sharing helps identify common patterns with these engine issues. Really appreciate everyone sharing their diagnostic experiences here, saved me from trying unusual fixes that might have made things worse.