What does Cummins fault code 3317 mean?

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AftertreatmentCummins Diesel ECM

Fault Code 3317

DPF, DEF, SCR, and NOx-reduction system faults.

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System

Cummins Aftertreatment

Cummins ECM Service

Diagnostic Overview

Cummins fault code 3317 is generally associated with DEF dosing system performance or pressure control. The DEF system may not be priming, purging, or maintaining pressure correctly. Common causes include a clogged DEF filter, failed pump, restricted line, crystallization, contaminated DEF, faulty pressure sensor, or harness issue. A technician should check DEF pressure during pump operation, inspect the filter and lines, verify electrical power and ground, and inspect the doser for crystallized deposits.

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Related Aftertreatment Fault Codes

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555

Cummins fault code 555 is commonly associated with high crankcase pressure or excessive engine blow-by.

1881

Cummins fault code 1881 commonly points to an aftertreatment DPF differential pressure sensor circuit problem, often a low-voltage, open-circuit, or signal issue.

1887

Cummins fault code 1887 is typically related to DPF differential pressure, soot loading, or regeneration performance.

1977

Cummins fault code 1977 is generally tied to aftertreatment regeneration performance or DPF restriction.

2639

Cummins fault code 2639 commonly relates to aftertreatment DPF differential pressure being above the expected range.

2771

Cummins fault code 2771 is commonly associated with SCR aftertreatment performance, DEF dosing, or NOx reduction issues.

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