DPF is designed to catch soot (unburned fuel/lube oil) and turn it into ash. The ash is pushed to the back of the filter and stored there. Periodically it needs to be cleaned to avoid complete replacement. With new DPFs costing over $7,000, routine maintenance is the key. Work with CarTronics Auto Repair to proactively schedule your DPF cleaning to decrease downtime and save on fuel.