DerateMaxxForce Diesel ECM

SPN 3712

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

Engine protection and emissions inducement power-limiting faults.

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Active derate — truck is losing power now

System

MaxxForce Derate

MaxxForce ECM Service

Diagnostic Overview

MaxxForce fault code SPN 3712 is commonly used as an emissions-related derate or inducement code. It usually means the vehicle is being power-limited because another aftertreatment or emissions fault has not been corrected. This is normally not the first failure in the chain. The root cause is usually an active DEF, SCR, DPF, NOx, exhaust temperature, dosing, or regeneration fault.

Likely Causes

Unresolved DEF/SCR fault, poor DEF quality, DPF restriction, failed regeneration, NOx sensor fault, exhaust temperature sensor fault, DEF dosing fault, or aftertreatment system not reset after repair.

What To Check First

Scan for all active and inactive emissions codes, repair the root code first, verify DPF/DEF/SCR operation, and complete the required reset, regen, or drive cycle to remove inducement.

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Related Derate Fault Codes

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3567

MaxxForce fault code 3567 is listed as a derate-related entry in the supplied list.

3572

MaxxForce fault code 3572 is listed as a derate-related fault and should be treated as a power-limiting or inducement indicator until the complete diagnostic detail is confirmed.

SPN 1001 FMI 18

MaxxForce fault code SPN 1001 FMI 18 indicates that a monitored parameter is valid but below the expected operating range at a moderately severe level.

SPN 1569 FMI 16

MaxxForce fault code SPN 1569 FMI 16 is commonly associated with engine protection torque derate being active.

SPN 1570 FMI 1

MaxxForce fault code SPN 1570 FMI 1 is commonly associated with fuel rail pressure being below the expected range on engines using high-pressure fuel control.

SPN 3362 FMI 31

MaxxForce fault code SPN 3362 FMI 31 is generally associated with a DEF dosing system condition where the ECM has detected an abnormal state or condition present.

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