Code result
P20E8
Reductant Pressure Too Low
High severity
What it means
Pressure in the AdBlue/DEF supply line is below the target. Usually a failing reductant pump, a clogged filter, frozen lines, or a leak in the pressurised circuit.
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
Reductant pump weak or failed
highOne of the most commonly reported causes for this code — check this first.
Reductant filter clogged with crystals
mediumA plausible cause — test and verify before replacing parts.
Leak in pressurised reductant line
mediumA plausible cause — test and verify before replacing parts.
Related help
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