Aftertreatment Problems new Technology Ends Dpf / Emission System Issues in all Hd Vehicles; Diesel Progress Says: this Technology is Going to Change the Way we Diagnose and Repair Heavy Duty Vehicles; Upstream Component Faults are the Root Cause of 89% of Aftertreatment Problems. Field Tests Indicate that Oem-Mandated Hd Powersmoke Dramatically Cut Repair Costs and Downtime while also Increasing Fuel Economy in Hd Vehicles. Thousands of Oems and Fleet Operators are Using this new Technology Every Day ...