P2D1F
Reductant System Flow – Restricted
The SCR module detects restricted flow in the reductant system. Pressure rises above expected for the commanded dosing rate.
The SCR module detects restricted flow in the reductant system. Pressure rises above expected for the commanded dosing rate.
Common causes
- high
Reductant filter clogged
One of the most commonly reported causes for this code — check this first.
Typical part cost: $170-1650
- medium
Supply line kinked
A plausible cause — test and verify before replacing parts.
Typical part cost: $170-1650
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does P2D1F mean?
P2D1F means "Reductant System Flow – Restricted". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.
What are the most common causes of P2D1F?
reductant filter clogged; supply line kinked — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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