What does Paccar PX fault code 3314 mean?

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AftertreatmentPaccar PX Diesel ECM

3314

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

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Paccar PX Aftertreatment

Paccar PX ECM Service

Diagnostic Overview

Cummins fault code 3314 commonly points to a DEF system pressure, pump, or dosing fault. The ECM may detect that DEF pressure is not building, not holding, or not responding properly when dosing is commanded. Causes include a restricted DEF filter, failed DEF pump, frozen DEF, contaminated DEF, blocked DEF line, crystallized doser, poor power or ground, or wiring damage. Diagnosis should include DEF quality testing, pump pressure checks, filter inspection, line inspection, and an commanded DEF dosing test.

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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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