Which indicator is a sign of extreme soot buildup?

Which indicator is a sign of extreme soot buildup?

• A. Oil pressure warning light
• B. Blinking DPF Regen Lamp
• C. Solid Check Engine Lamp
• D. Solid Stop Engine Lamp

Answer: (B)

Extreme soot buildup shows up in the exhaust aftertreatment system, specifically the diesel particulate filter (DPF). When the DPF becomes heavily loaded with soot, the system prompts regeneration to burn off that soot. A blinking DPF Regen Lamp is the warning pattern signaling that this situation is severe and action is needed, such as initiating an active regeneration or stopping to service the filter. The other indicators relate to lubrication (oil pressure) or generic engine faults (check engine) or a critical stop condition, but they are not specific signs of extreme soot in the DPF.

Extreme soot buildup shows up in the exhaust aftertreatment system, specifically the diesel particulate filter (DPF). When the DPF becomes heavily loaded with soot, the system prompts regeneration to burn off that soot. A blinking DPF Regen Lamp is the warning pattern signaling that this situation is severe and action is needed, such as initiating an active regeneration or stopping to service the filter. The other indicators relate to lubrication (oil pressure) or generic engine faults (check engine) or a critical stop condition, but they are not specific signs of extreme soot in the DPF.