DESCRIPTION:DEF system is not being controlled as expected.
MONITORED PARAMETER:1. DEF pump speed.2. Pump duty cycle.
TYPICAL ENABLING CONDITIONS:1. DEF pump operation is above.2. Below defined thresholds.
MONITOR SEQUENCE:None
EXECUTION FREQUENCY:Continuous when enabling conditions met.
TYPICAL DURATION:2 minutes
DASH LAMPS:1. MIL2. CEL
ENGINE REACTION:Derate 25%
VERIFICATION:SCR ADS Self-Check.
NOTE: If any other codes active, fix those first.
PROBABLE CAUSES:1. Inspect the DEF pump connector/harness.2. DEF pump failure.
Detroit DD13 GHG14 (2014-16) Fault Code: SPN 4374 FMI 4 (ACM) Diesel Exhaust Fluid (DEF) Pump Speed Signal Below Measurement Range
Detroit DD13 GHG14 (2014-16) Fault Code: SPN 4374 FMI 3 (ACM) Diesel Exhaust Fluid (DEF) Pump Speed Signal Above Measurement Range
Detroit DD13 GHG14 (2014-16) Fault Code: SPN 4374 FMI 1 (ACM) Over Pressurized DEF System
Detroit DD13 GHG14 (2014-16) Fault Code: SPN 4374 FMI 0 (ACM) Under Pressurized Diesel Exhaust Fluid System
Detroit DD13 GHG14 (2014-16) Fault Code: SPN 4364 FMI 18 (ACM) SCR NOx Conversion Efficiency Low
Detroit DD13 GHG14 (2014-16) Fault Code: SPN 4364 FMI 1 (ACM) SCR NOx Conversion Efficiency Very Low