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Isuzu US-IDSS 2024 Diagnostic is a comprehensive tool for the effective maintenance and repair of Isuzu vehicles. It integrates advanced diagnostic features to assist technicians in identifying and resolving issues promptly. This system supports a wide range of Isuzu models, ensuring compatibility with both US and Canadian specifications. Its capabilities include vehicle recognition, fault code analysis, and real-time data access to streamline the diagnostic process.
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Detroit DD15 GHG14 (2014-16) Fault Code: SPN 4374 FMI 0 (ACM) Under Pressurized Diesel Exhaust Fluid System

DESCRIPTION:
This code sets when the Diesel Exhaust Fluid (DEF) pump speed is higher than normal for a given DEF pressure.

MONITORED PARAMETER:
1. DEF Pump Speed.
2. DEF Pressure.

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Continuous when enabling conditions met.

TYPICAL DURATION:
Continuous until resolved.

DASH LAMPS:
1. MIL
2. CEL

ENGINE REACTION:
Derate 25%

VERIFICATION:
SCR ADS Self-Check.

NOTE: If any other codes are present, repair them first.

PROBABLE CAUSES:
1. Check connectors & wiring for: DEF dosing unit, DEF pump, Aftertreament Control Module, Chassis/ATS harness wiring/connector.
2. Contaminated DEF tank (Fuel, water, etc…).
3. Check DEF lines for blockages, kinks, cracks, etc…
4. DEF doser unit inlet screen.
5. DEF suction filter.
6. Pressure relief valve.
7. DEF tank header.

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