AftertreatmentCaterpillar Diesel ECM

SPN 5246 FMI 16

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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Caterpillar Aftertreatment

Caterpillar ECM Service

Diagnostic Overview

CAT fault code 5246-16 is commonly used as an aftertreatment inducement or emissions-related derate code. It usually means the ECM has detected an unresolved emissions fault and is limiting operation to force repair. This code is often not the original failure. The root cause is usually another active DEF, SCR, DPF, NOx sensor, temperature sensor, ARD, or dosing code. The correct approach is to diagnose the complete code list and repair the underlying emissions fault before attempting to clear inducement status.

Likely Causes

Unresolved aftertreatment fault; DEF quality issue; DEF dosing failure; SCR efficiency fault; DPF restriction; NOx sensor fault; exhaust temperature sensor fault; failed regeneration; ignored inducement warnings.

What To Check First

Scan all active codes, identify the root aftertreatment fault, repair it, then complete the required service test, regen, reset, or confirmation cycle in Cat ET.

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Related Aftertreatment Fault Codes

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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.

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