Code result
P226D
Particulate Filter Deteriorated/Missing Substrate
High severity
What it means
The DPF substrate on bank 1 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.
Is it safe to drive?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
Substrate cracked or melted from runaway regen
highOne of the most commonly reported causes for this code — check this first.
Substrate removed by tampering
mediumA plausible cause — test and verify before replacing parts.
Related help
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