2010 VW Jetta TDI Check Engine Light On: How to Fix P0401 Code

Good afternoon. I own a 2010 Volkswagen Jetta TDI, and my check engine light has come on. After visiting an auto parts store, the diagnostic tool returned a P0401 code. What components should be replaced or repaired to resolve this issue? The P0401 code indicates a diesel particulate filter (DPF) system malfunction, specifically a failure in the DPF regeneration process. This is common in 2010 VW Jetta TDI models and may require cleaning, sensor calibration, or replacement of the DPF depending on vehicle history and diagnostic results.