AftertreatmentMaxxForce Diesel ECM

SPN 3361

Name: ECM Performance
Address: Fort Lauderdale, FL, 33325, US
Telephone: (888) 768-2447
Price range: $$-$$$

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

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System

MaxxForce Aftertreatment

MaxxForce ECM Service

Diagnostic Overview

MaxxForce fault code SPN 3361 is typically associated with DEF dosing or aftertreatment fluid delivery. The SCR system depends on accurate DEF dosing to reduce NOx emissions, and the ECM may set this code when the DEF dosing system does not respond as expected. Without the FMI, the exact failure mode is not known, but this code should be investigated with the DEF pump, doser, lines, pressure sensor, and related SCR performance data.

Likely Causes

DEF doser restriction, crystallized DEF, failed DEF pump, low DEF pressure, restricted DEF filter, contaminated DEF, wiring fault, poor connector contact, or related SCR efficiency issue.

What To Check First

Check DEF quality, inspect the doser for crystallization, verify DEF pump pressure, run a commanded dosing test, and check for related SPN 3362, SPN 3363, or SCR efficiency faults.

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Related Aftertreatment Fault Codes

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SPN 1761

MaxxForce fault code SPN 1761 is commonly associated with the diesel exhaust fluid system, especially DEF level or DEF tank monitoring.

SPN 2637

MaxxForce fault code SPN 2637 generally belongs in the aftertreatment monitoring group and may relate to DPF regeneration, exhaust temperature control, or aftertreatment system performance depending on the engine and calibration.

SPN 3251

MaxxForce fault code SPN 3251 is commonly associated with diesel particulate filter differential pressure.

SPN 3362

MaxxForce fault code SPN 3362 usually points to DEF dosing system operation, DEF pressure, or DEF delivery control depending on the calibration.

SPN 3363

MaxxForce fault code SPN 3363 is commonly associated with DEF quality, DEF dosing performance, or SCR system response.

SPN 3719

MaxxForce fault code SPN 3719 is generally tied to DPF soot-load, regeneration, or aftertreatment restriction monitoring.

View All Aftertreatment Codes →