RS7 Camshaft Sensor Issues Killing Performance

I had very similar issues with my 2015 RS6. As someone with some hands-on experience working on these engines, the symptoms you describe definitely match what I encountered, rough idling, stalling engine, and overall poor performance. Initially, my car was throwing sensor failure codes. The workshop discovered a damaged wire connection to the camshaft sensor, which was causing intermittent signals. The timing issues this created led to the performance problems. The fix involved replacing the wiring harness and testing the sensor connections, costing 95 Euro in total. Before jumping to conclusions though, could you share: What specific error codes are you getting? Does the check engine light stay on constantly or flicker? Are the starting problems more noticeable when the engine is cold or warm? Have you noticed any unusual sounds while idling? These details would help confirm if your issue matches what I experienced. The symptoms could also point to other sensor-related problems in these engines, so having the complete picture would be valuable for proper diagnosis.

After running more diagnostics, the error codes are P0341 and P0343. The check engine light stays on constantly. Starting problems are definitely worse when the engine is cold, and there is a distinct ticking noise during idle. Current mileage is 79377 KM and last service was completed in January. The rough idling has gotten progressively worse over the past few weeks, especially during cold starts. The automotive sensor readings from my scan tool show inconsistent camshaft position values, which seems to confirm the initial suspicion of sensor failure. I will schedule a workshop visit to have the wiring connections checked first, as that seems like a logical starting point based on your experience with similar timing issues. Thanks for the detailed breakdown of your repair process.

Based on those error codes and symptoms, it seems your situation is nearly identical to what I experienced. The P0341 and P0343 codes on my RS6 were also related to the camshaft position sensor circuit, and that ticking noise during idle was a telltale sign. When my mechanic dug deeper into the wiring, they found corrosion at the sensor connector that was causing intermittent readings. The rough idling and cold start issues cleared up completely after addressing the wiring and replacing the camshaft sensor as a preventive measure. Total repair cost including parts and labor came to around 280 Euro. Just a heads up, while checking the wiring, make sure they inspect the entire harness route. In my case, there was some minor damage where the wires passed near the timing cover, likely from vibration over time. The check engine light issues disappeared once all connection points were properly secured. Given your mileage and symptoms progression, this definitely sounds like the same sensor-related problem I dealt with. The inconsistent camshaft position readings you mentioned are exactly what triggered my timing issues and power loss.

The diagnostic codes P0341 and P0343 plus the cold start issues match my symptoms exactly. Based on your repair experience, I will have them focus on both the wiring harness inspection and the camshaft sensor itself. The engine misfire during cold starts and stalling engine problems have definitely gotten worse, so addressing this sooner rather than later seems wise. I have booked the car in for next week. The shop quoted around 300 Euro for parts and labor, which aligns with what you paid. They mentioned they will first check all wiring connections and the camshaft position sensor circuit before replacing any components. The consistent check engine light and rough idling symptoms make me confident we are on the right track. I will update once the repair is completed. Thank you for sharing such detailed information about your similar experience, it helped narrow down the likely cause and gave me a clear direction for the fix.