A category of programs exists that modifies or bypasses the diesel particulate filter (DPF) system in heavy-duty vehicles. These programs, often installed on the vehicle’s electronic control unit (ECU), alter the operation of the engine and exhaust system to circumvent the DPF’s intended function of trapping particulate matter. For example, they might disable the regeneration cycle or provide false sensor readings to prevent error codes related to a malfunctioning DPF.
Circumventing emission control systems can appear to offer several perceived advantages, including increased engine power and fuel efficiency, as well as reduced maintenance costs associated with DPF upkeep and replacement. Historically, the development of these programs grew alongside stricter emission regulations, presenting an alternative for those seeking to avoid the complexities and potential downtime associated with advanced emission control technologies.
