Experiencing car troubles can be frustrating, especially when warning lights appear on your dashboard. For one Audi A4 B9 2.0 TDI owner, a “Drive system fault” message, coupled with an inoperative auto start-stop system, led to the discovery of a common issue: a clogged Diesel Particulate Filter (DPF). Using an OBDeleven diagnostic tool, the fault code P245800, indicating “Particulate Filter Regeneration Duration Bank 1,” confirmed the suspicion. High soot levels further validated the need for DPF regeneration.
Initially, attempts to initiate a forced DPF regeneration using standard procedures proved unsuccessful. However, by slightly modifying the process within the OBDeleven app, a successful regeneration was achieved. The key was to first activate “Service regeneration of particulate filter while driving” in the Basic Settings, followed immediately by activating “Service regeneration of particle filter.” Throughout the 30-minute process, maintaining a steady engine speed around 1500rpm and keeping both pedals pressed was crucial. After the initial regeneration phase, the engine sound changed, and the revs remained elevated for a short period before finally returning to idle, signaling completion.
A final OBD scan confirmed the successful regeneration and cleared the fault code. This user’s experience highlights the effectiveness of using OBD2 tools like OBDeleven to perform a forced DPF regeneration, even when standard procedures might initially fail. By sharing this specific method, it’s hoped that other Audi owners facing similar DPF issues can find a solution and get back on the road.
