What is the function of a manual regeneration switch on diesel-equipped vehicles?

What is the function of a manual regeneration switch on diesel-equipped vehicles?

• A. A switch that automatically shuts off the engine
• B. A switch drivers can use to initiate an active regeneration to burn off DPF soot
• C. A switch that diverts exhaust to a secondary chamber
• D. A switch that toggles between DEF and fuel

Answer: (B)

A manual regeneration switch is used to start an active regeneration of the diesel particulate filter (DPF). The DPF traps soot from the engine, and to keep the filter from clogging, it must be periodically cleaned by burning off that soot. An active regeneration raises the exhaust temperature to oxidize the soot, and the manual switch lets the driver initiate this process when automatic regeneration hasn’t occurred or when conditions are suitable for a controlled regeneration. It isn’t for shutting off the engine, diverting exhaust to another chamber, or switching between DEF and fuel.

A manual regeneration switch is used to start an active regeneration of the diesel particulate filter (DPF). The DPF traps soot from the engine, and to keep the filter from clogging, it must be periodically cleaned by burning off that soot. An active regeneration raises the exhaust temperature to oxidize the soot, and the manual switch lets the driver initiate this process when automatic regeneration hasn’t occurred or when conditions are suitable for a controlled regeneration. It isn’t for shutting off the engine, diverting exhaust to another chamber, or switching between DEF and fuel.