Detroit DD16 GHG14 (2014-16) Fault Code: SPN 520327 FMI 4 (ACM) Over Pressurized Diesel Exhaust Fluid System

DESCRIPTION:
Over pressurized Diesel Exhaust Fluid (DEF) system.

MONITORED PARAMETER:
DEF pump speed vs. DEF Pressure.

TYPICAL ENABLING CONDITIONS:
DEF dosing enabled.

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Continuous when enabling conditions met.

TYPICAL DURATION:
Continuous until resolved.

DASH LAMPS:
CEL

ENGINE REACTION:
None

VERIFICATION:
Parked Regen

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.

If you want to know other articles similar to Detroit DD16 GHG14 (2014-16) Fault Code: SPN 520327 FMI 4 (ACM) Over Pressurized Diesel Exhaust Fluid System you can visit the category DD16 GHG14 (2014-16).