AftertreatmentCaterpillar Diesel ECM

ARD

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

Needs VerificationThis code as listed may be incomplete or non-standard (e.g. a partial code, placeholder term, or reference number rather than a confirmed fault code). Pull the exact code in the Cat ET tool before using this page for a repair decision.

Diagnostic Overview

ARD is not a fault code by itself. On many Caterpillar aftertreatment systems, ARD refers to the Aftertreatment Regeneration Device, which helps create the heat needed for DPF regeneration. ARD-related faults can involve fuel delivery, air supply, ignition, combustion, temperature rise, or failed regeneration performance. If ARD is listed on a fault-code sheet, it should be expanded into the specific ARD SPN/FMI or event code before a repair path is chosen.

Likely Causes

Incomplete ARD code; ARD fuel delivery issue; restricted ARD air supply; failed ignition; plugged nozzle; exhaust temperature sensor issue; failed regeneration.

What To Check First

Retrieve the exact ARD-related code, inspect ARD fuel and air systems, check temperature rise during regen, and review failed regeneration history.

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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 →