2009 VW GLI 2.0T P0016 Fault Code: Causes and Solutions After Replacing Cam and Crank Sensors

I own a 2009 Volkswagen GLI with a 2.0L turbo engine, and I'm currently encountering OBD-II diagnostic code P0016. Despite replacing both the camshaft and crankshaft position sensors, the P0016 code persists. Could the timing chain be the root cause? Specifically, is incorrect valve timing or a stretched/tightened timing chain contributing to this fault? The P0016 code indicates a discrepancy in the camshaft position relative to the crankshaft, which may point to mechanical issues such as worn components or improper installation. I'm seeking confirmation on whether the timing chain should be inspected and adjusted as part of troubleshooting this issue.