The aftertreatment system within a heavy-duty vehicle reduces the engine’s harmful emissions by cleaning the exhaust gases.

Single Module aftertreatment system combines the Diesel Oxidation Catalyst (DOC), Diesel Particulate Filter (DPF) and Selective Catalytic Reduction (SCR) systems into a single canister. The ...

Either event is likely the reason a yellow dash light came on. The DPF light means the system needs to regenerate. When it’s flashing, the regen must be done while parked. A solid DPF light ...