What does Paccar PX fault code 2963 mean?

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AftertreatmentPaccar PX Diesel ECM

2963

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

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System

Paccar PX Aftertreatment

Paccar PX ECM Service

Diagnostic Overview

Cummins fault code 2963 is commonly related to aftertreatment temperature sensing or exhaust temperature rationality. The ECM relies on exhaust gas temperature sensors to manage regeneration, protect the DPF and SCR, and confirm that aftertreatment temperatures are within range. Causes can include a failed exhaust temperature sensor, damaged wiring, loose connector, exhaust leak near the sensor, incorrect sensor installation, or abnormal exhaust temperature caused by another engine issue. Diagnosis should compare cold and hot live data, inspect the harness, and verify that the sensor is installed in the correct location.

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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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