Code result
P20D8
Exhaust Aftertreatment Fuel Supply Control Performance
Moderate severity
What it means
Aftertreatment fuel supply is electrically OK but does not deliver the commanded pressure or flow during regeneration — weak pump or partial blockage.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Pump weak — flow or pressure below threshold
highOne of the most commonly reported causes for this code — check this first.
Related help
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