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.
Detroit DD13 GHG14 (2014-16) Fault Code: SPN 520327 FMI 3 (ACM) Under Pressurized Diesel Exhaust Fluid System
Detroit DD13 GHG14 (2014-16) Fault Code: SPN 520326 FMI 4 (ACM) Over Pressurized Diesel Exhaust Fluid (DEF) System
Detroit DD13 GHG14 (2014-16) Fault Code: SPN 520326 FMI 3 (ACM) Under Pressurized Diesel Exhaust Fluid System
Detroit DD13 GHG14 (2014-16) Fault Code: SPN 520323 FMI 4 (ACM) High Side Digital Output Circuit Failed Low
Detroit DD13 GHG14 (2014-16) Fault Code: SPN 520323 FMI 3 (ACM) High Side Digital Output Circuit Failed High
Detroit DD13 GHG14 (2014-16) Fault Code: SPN 520296 FMI 31 (MCM) Exhaust Gas Recirculation Valve Actuator, Learn Cycle Incomplete