Detroit DD16 GHG14 (2014-16) Fault Code: SPN 520327 FMI 3 (ACM) Under Pressurized Diesel Exhaust Fluid System

DESCRIPTION:
This fault code sets when the actual Diesel Exhaust Fluid (DEF) pump speed is low compared to the calibrated DEF pump speed that is needed to achieve the pressure.

MONITORED PARAMETER:
DEF Pump Speed and DEF Pressure.

TYPICAL ENABLING CONDITIONS:
DEF dosing enabled.

EXECUTION FREQUENCY:
Continuous when enabling conditions are met.

TYPICAL DURATION:
Continuous until resolved.

DASH LAMPS:
CEL

ENGINE REACTION:
None

VERIFICATION:
SCR ADS self check.

NOTE: If any other codes are active, fix those first.

PROBABLE CAUSES:
1. Inspect the DEF dosing unit and DEF pump harness wiring & connectors.
2. Check all DEF lines for damage/blocks/kinks.
3. DEF pump suction filter.
4. DEF dosing unit inlet filter.
5. DEF tank header.
6. DEF tank supply filter.
7. Replace the pressure relief valve.

Categories DD16 GHG14 (2014-16), Detroit, DTC TRUCKS Tags 16, 2014, 3, 520327, ACM, Code, DD16, Detroit, Diesel, Exhaust, Fault, Fluid, FMI, GHG14, Pressurized, SPN, System, Under

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