Just Map It Out — The Truth About Modern DPF Problems The internet’s favourite diesel “repair” seems to be: - “Just delete it.” - “Gut the DPF.” - “Map it out mate.” - “Problem solved.” At Prestige Performance Group in Newtownards, Northern Ireland, we hear these comments every single day whenever a vehicle develops a DPF fault. But here’s the reality: A huge percentage of vehicles suffering from DPF problems DO NOT actually have a failed DPF filter. The DPF is often just