Detroit DD16 GHG14 (2014-16) Fault Code: SPN 520326 FMI 4 (ACM) Over Pressurized Diesel Exhaust Fluid (DEF) System

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

MONITORED PARAMETER:
DEF pump speed vs. DEF Pressure.

TYPICAL ENABLING CONDITIONS:
DEF pump enabled OR on-off-cycle request.

EXECUTION FREQUENCY:
Continuous when enabling conditions are met.

TYPICAL DURATION:
2 mintues

DASH LAMPS:
None

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, 4, 520326, ACM, Code, DD16, DEF, Detroit, Diesel, Exhaust, Fault, Fluid, FMI, GHG14, Over, Pressurized, SPN, System

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