Particulate Filter Restriction - Soot Accumulation Bank 1

Check these first

• Short trips that keep the DPF below regeneration temperature
• A DPF that has never been serviced on schedule
• High sulfur diesel that loads the filter faster
• Cold weather operation that blocks regeneration

What to do next

1. Read the DPF soot load and ash load on a scan tool
2. Run a forced DPF regeneration and watch the temperature rise
3. Check for stored codes that blocked regeneration
4. Inspect the DPF for ash that regeneration cannot burn off
5. Clean or replace the DPF if the soot load stays high after a regeneration
6. Clear the code and retest

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