Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 4334
FMI: 3
Description: Diesel Exhaust Fluid Pressure Sensor Circuit Failed High
Troubleshooting:
DESCRIPTION:
Diesel exhaust fluid (DEF) pressure sensor circuit voltage above normal, or shorted to high
source.
MONITORED PARAMETER:
Diesel Exhaust Fluid (DEF) pressure sensor.
TYPICAL ENABLING CONDITIONS:
Always enabled
MONITOR SEQUENCE:
None
EXECUTION FREQUENCEY:
Always enabled
TYPCIAL DURATION:
2 seconds
DASH LAMPS:
1. MIL
2. CEL
ENGINE REACTION:
Derate 25%
VERIFICATION:
Engine idle (1 minute).
POSSIBLE CAUSES:
1. Damaged pins.
2. Bent pins.
3. Spread pins.
4. Broken pins.
5. Pushed out pins.
6. Corroded pins.
7. Faulty DEF dosing unit.
8. Faulty wiring.
9. Faulty ACM.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 4332
FMI: 31
Description: DOC Inlet Temperature Out of Range Low Preventing Dosing
Troubleshooting:
NOTE: The fault indicates the high idle regeneration (HIR) was aborted due to diesel oxidation
catalyst (DOC) inlet temperature not reaching the minimum of 270°C (518°F) to initiate dosing
during and HIR. The malfunction indicator lamp (MIL) will remain ON until the fault is resolved
or a successful regeneration is complete.
DESCRIPTION:
DOC inlet temperature out of range low.
MONITORED PARAMETER:
DOC temperature
TYPICAL ENABLING CONDITIONS:
Regeneration
MONITOR SEQUENCE:
None
EXECUTION FREQUENCEY:
Continuous when enabling conditions met.
TYPCIAL DURATION:
Two seconds
DASH LAMPS:
MIL
ENGINE REACTION:
None
VERIFICATION:
Parked regeneration
NOTE: Retain log file if customer assistance is required.
POSSIBLE CAUSES:
1. Faulty DOC inlet temperature sensor.
2. Parked regen needed.
3. Faulty Intake Throttle Valve (ITV).
4. Leaks in the exhaust system.
5. Leaks in the intake tract.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 3363
FMI: 0
Description: Diesel Exhaust Fluid Tank Temperature – High
Troubleshooting:
DESCRIPTION:
Diesel exhaust fluid (DEF) tank temperature – high.
MONITORED PARAMETER:
DEF tank temperature.
TYPICAL ENABLING CONDITIONS:
1. Coolant valve closed greater than 1.5 hrs.
2. Coolant temperature greater than 158°F.
MONITOR SEQUENCE:
None
EXECUTION FREQUENCEY:
Continuous when enabling conditions met.
TYPCIAL DURATION:
5 seconds
DASH LAMPS:
MIL
VERIFICATION:
Parked regeneration
POSSIBLE CAUSES:
1. Faulty DEF tank header assembly.
2. Coolant line routing needs correcting.
3. Bent pins.
4. Spread pins.
5. Corroded pins.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 3361
FMI: 4
Description: Diesel Exhaust Fluid System Circuit Failed Low
Troubleshooting:
DESCRIPTION:
Diesel exhaust fluid (DEF) system circuit low voltage signal or short to ground.
MONITORED PARAMETER:
DEF dosing unit voltage.
TYPICAL ENABLING CONDITIONS:
DEF dosing enabled them disabled.
MONITOR SEQUENCE:
None
EXECUTION FREQUENCEY:
Continuous when enabling conditions met.
TYPCIAL DURATION:
50 seconds (max).
DASH LAMPS:
1. MIL
2. CEL
ENGINE REACTION:
Derate 25%
VERIFICATION:
Key cycle off five minutes after repair.
POSSIBLE CAUSES:
1. Damaged pins.
2. Bent pins.
3. Spread pins.
4. Broken pins.
5. Pushed out pins.
6. Corroded pins.
7. Damaged wire.
8. Faulty DEF dosing unit.
9. Faulty ACM.