P226E
Particulate Filter Deteriorated/Missing Substrate (Bank 2)
The DPF substrate on bank 2 has been detected as cracked, melted, or removed. Differential pressure across the filter is too low for the measured exhaust flow — the soot trap no longer works.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Symptoms
- Check engine light or DPF warning light on
- Power loss / limp mode
- Increased fuel consumption
- Failed forced regeneration attempts
Common causes
Ordered by how often each turns out to be the cause.
- Substrate cracked, melted, or removedCommon
Parts involved
- Diesel Particulate Filter
P226E is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.