Diesel Particulate Filter Efficiency Below Threshold (Bank 2)
Common Symptoms
- Check engine light illuminated
- Reduced engine power or derate
- Excessive black smoke from exhaust
- Poor fuel economy
- DPF regeneration cycles more frequently than normal
- Strong diesel odor from exhaust
Most Likely Root Causes
- Clogged or damaged diesel particulate filter
- Failed DPF differential pressure sensor
- Exhaust leaks upstream of DPF
- Faulty DPF temperature sensors
- Engine oil contamination in DPF from excessive oil consumption
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Component Location
The diesel particulate filter is located in the exhaust system downstream of the turbocharger and DOC, typically under the vehicle chassis.
Manufacturer Notes
Bank 2 designation typically applies to multi-bank diesel engines such as V-configuration heavy-duty platforms with dual aftertreatment systems.
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