Code result
P28F8
Exhaust Pressure Too High Bank 2
High severity
What it means
The exhaust pressure measured on bank 2 exceeds the calibrated maximum. Common causes are clogged DPF, restricted exhaust path, or stuck exhaust brake/back-pressure valve.
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
DPF clogged with soot or ash
highOne of the most commonly reported causes for this code — check this first.
Back-pressure valve stuck closed
mediumA plausible cause — test and verify before replacing parts.
Related help
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