Code result
P2D1F
Reductant System Flow – Restricted
High severity
What it means
The SCR module detects restricted flow in the reductant system. Pressure rises above expected for the commanded dosing rate.
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 filter clogged
highOne of the most commonly reported causes for this code — check this first.
Supply line kinked
mediumA plausible cause — test and verify before replacing parts.
Related help
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