Particulate Filter Differential Pressure Too High Bank 1

Check these first

• A bank 1 particulate filter loaded with soot or ash
• A blocked bank 1 DPF pressure sensor hose
• A failed bank 1 DPF pressure sensor reading high
• A restricted bank 1 exhaust downstream

What to do next

1. Read bank 1 DPF differential pressure and soot load on a scan tool
2. Run a forced regeneration to clear soot
3. Inspect the bank 1 sensor hoses for blockage
4. Check the bank 1 exhaust for downstream restriction
5. Replace the bank 1 filter if restriction stays high after regeneration
6. Clear the code and retest

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