DESCRIPTION:
Diesel exhaust fluid (DEF) air pressure not detected (from vehicle supply).
MONITORED PARAMETER:
Vehicle air pressure.
TYPICAL ENABLING CONDITIONS:
1. Engine rpm is greater than 500.
2. Dosing enabled.
MONITOR SEQUENCE:
None
EXECUTION FREQUENCY:
Continuous when enabling conditions met.
DASH LAMPS:
1. MIL
2. CEL
ENGINE REACTION:
Derate 25%
VERIFICATION:
Selective catalytic reduction (SCR) air pressure test.
PROBABLE CAUSES:
1. Vehicle not reaching 100 PSI.
2. DEF metering unit air pressure sensor.
3. Pressure limiting valve.
4. Flush DEF system.
Detroit DD16 EPA10 (2010-13) Fault Code: SPN 4334 FMI 17 (ACM) Diesel Exhaust Fluid (DEF) Purge Pressure High
Detroit DD16 EPA10 (2010-13) Fault Code: SPN 4334 FMI 7 (ACM) DEF Pressure Low
Detroit DD16 EPA10 (2010-13) Fault Code: SPN 4334 FMI 4 (ACM) Diesel Exhaust Fluid Pressure Sensor Circuit Failed Low
Detroit DD16 EPA10 (2010-13) Fault Code: SPN 4334 FMI 3 (ACM) Diesel Exhaust Fluid Pressure Sensor Circuit Failed High
Detroit DD16 EPA10 (2010-13) Fault Code: SPN 4334 FMI 2 (ACM) Diesel Exhaust Fluid Metering Unit Pressure Sensor – Drift
Detroit DD16 EPA10 (2010-13) Fault Code: SPN 4258 FMI 4 (MCM) Injector Amplifier Control Valve Cylinder 4, 5, 6 Shorted to Ground