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Detroit DD13 EPA10 (2010-13) Fault Code: SPN 4335 FMI 7 (ACM) DEF Metering Unit Air Pressure – Low
DESCRIPTION:Diesel exhaust fluid (DEF) metering unit air pressure low.
MONITORED PARAMETER:Diesel exhaust fluid (DEF) metering unit air pressure.
TYPICAL ENABLING CONDITIONS:1. Engine rpm greater than 500.2. Dosing enabled.
MONITOR SEQUENCE:None
EXECUTION FREQUENCY:Continuous when enabling conditions met.
TYPICAL DURATION:Six seconds
DASH LAMPS:MIL
ENGINE REACTION:Derate 25%
VERIFICATION:SCR air pressure test (test duration is 60 seconds).
PROBABLE CAUSES:1. Vehicle not reaching 100 PSI.2. DEF metering unit air pressure sensor.3. Pressure limiting valve.4. Flush DEF system.
Detroit DD13 EPA10 (2010-13) Fault Code: SPN 4335 FMI 4 (ACM) Diesel Exhaust Fluid Metering Unit Air Pressure Sensor Circuit Failed Low
Detroit DD13 EPA10 (2010-13) Fault Code: SPN 4335 FMI 3 (ACM) Diesel Exhaust Fluid Metering Unit Air Pressure Sensor Circuit Failed High
Detroit DD13 EPA10 (2010-13) Fault Code: SPN 4335 FMI 2 (ACM) Diesel Exhaust Fluid Air Pressure Sensor – Drift
Detroit DD13 EPA10 (2010-13) Fault Code: SPN 4335 FMI 1 (ACM) Diesel Exhaust Fluid Air Pressure Not Detected (from Vehicle Supply)
Detroit DD13 EPA10 (2010-13) Fault Code: SPN 4334 FMI 17 (ACM) Diesel Exhaust Fluid (DEF) Purge Pressure High
Detroit DD13 EPA10 (2010-13) Fault Code: SPN 4334 FMI 7 (ACM) DEF Pressure Low