AftertreatmentCaterpillar Diesel ECM

SPN 3480 FMI 17

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

Caterpillar Aftertreatment

Caterpillar ECM Service

Diagnostic Overview

CAT fault code 3480-17 is commonly tied to aftertreatment fuel pressure or ARD fuel delivery being below the expected range. The regeneration device may not be receiving enough fuel to create the heat needed for DPF regeneration. If this code is active, regeneration may fail or be disabled, causing soot load to increase. The problem can be a true fuel supply issue or a sensor/reporting issue, so both should be checked.

Likely Causes

Low ARD fuel pressure; restricted fuel supply; plugged filter; failed ARD fuel pump or valve; air in fuel; failed pressure sensor; damaged harness.

What To Check First

Verify fuel supply to the ARD system, inspect filters and lines, compare commanded versus actual pressure, and check the ARD pressure sensor and wiring.

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Related Aftertreatment Fault Codes

View All Aftertreatment Codes

SPN 1761 FMI 17

CAT fault code 1761-17 commonly relates to diesel exhaust fluid level or a DEF level signal that is below the expected range.

SPN 3360 / SPN 3820

CAT codes listed as 3360/3820 generally point toward the DEF supply, DEF quality, DEF tank, or SCR dosing system depending on the exact FMI shown in Cat ET.

SPN 3361 / SPN 3821

CAT codes listed as 3361/3821 commonly belong to the DEF dosing or SCR control side of the aftertreatment system.

SPN 3474 FMI 31

CAT fault code 3474-31 is typically associated with aftertreatment regeneration or ARD-related operation.

SPN 3701 FMI 15

CAT fault code 3701-15 commonly indicates an aftertreatment condition that is above normal but at a least-severe level, often connected with DPF soot load, regeneration need, or aftertreatment restriction.

SPN 3701 FMI 16

CAT fault code 3701-16 usually represents a more serious aftertreatment condition than 3701-15, with the measured or calculated value above normal at a moderate severity level.

View All Aftertreatment Codes →