Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 3250
FMI: 20
Description: Diesel Oxidation Catalyst Temperature Drift – Inlet Low or Outlet High
Troubleshooting:
DESCRIPTION:
70°C (158°F) difference during non-regeneration mode.
MONITORED PARAMETER:
Diesel Oxidation Catalyst (DOC) Inlet.
TYPICAL ENABLING CONDITIONS:
1. Coolant temperature greater than 60°C (140°F).
2. Regen not active in last five minutes.
EXECUTION FREQUENCEY:
Continuous when enabling conditions met.
TYPCIAL DURATION:
One minute
DASH LAMPS:
1. CEL
2. MIL
ENGINE REACTION:
Regen inhibit and 10% engine derate.
POSSIBLE CAUSES:
Faulty DOC temperature sensor.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 3250
FMI: 31
Description: Abnormal Diesel Oxidation Catalyst Temperature Rise
Troubleshooting:
DESCRIPTION:
Abnormal diesel oxidation catalyst (DOC) temperature rise.
MONITORED PARAMETER:
DOC Temperature
TYPICAL ENABLING CONDITIONS:
Always on
MONITOR SEQUENCE:
None
EXECUTION FREQUENCEY:
Continuous when enabling conditions met.
TYPCIAL DURATION:
Two seconds
DASH LAMPS:
1. MIL
2. CEL
3. SEL
ENGINE REACTION:
1. 25% Derate
2. Engine shutdown
VERIFICATION:
Parked regen
NOTE: This fault indicates the aftertreatment control module (ACM) has detected a sudden
temperature shift on the diesel particulate filter (DPF) outlet temperature sensor. The most
likely cause is an intermittent wiring concern (poor terminal fit, corrosion, chaffing, etc.).
POSSIBLE CAUSES:
1. Faulty DOC outlet temperature sensor.
2. Faulty harness connector terminals between the DOC outlet temperature sensor and the
ACM, including the chassis extension harness and Aftertreatment Device (ATD) sensor box.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 3251
FMI: 0
Description: Diesel Particulate Filter Pressure Out of Range Very High
Troubleshooting:
DESCRIPTION:
This fault code sets when the diesel oxidation catalyst (DOC) inlet pressure (5 psi) greater than
the calculated diesel particulate filter (DPF) outlet pressure more than 10 seconds.
MONITORED PARAMETER:
DOC Inlet Pressure sensor.
TYPICAL ENABLING CONDITIONS:
Always on
MONITOR SEQUENCE:
None
EXECUTION FREQUENCEY:
Continuous when enabling conditions met.
TYPCIAL DURATION:
Two seconds
DASH LAMPS:
1. MIL
2. CEL
3. SEL
ENGINE REACTION:
Derate 25% shutdown.
VERIFICATION:
Run engine between 1200 to 1800 rpm with a load less than 10%.
POSSIBLE CAUSES:
1. Faulty DOC inlet pressure sensor.
2. Faulty DPF outlet pressure sensor.
3. Parked regen needed.
4. DOC needs face cleaning.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 3251
FMI: 20
Description: Diesel Oxidation Catalyst Inlet Pressure – Not Plausible
Troubleshooting:
DESCRIPTION:
Diesel oxidation catalyst (DOC) inlet pressure sensor – not plausible.
MONITORED PARAMETER:
Exhaust pressure
TYPICAL ENABLING CONDITIONS:
Always on
MONITOR SEQUENCE:
None
EXECUTION FREQUENCEY:
Continuous when enabling conditions met.
TYPCIAL DURATION:
Two seconds
DASH LAMPS:
1. MIL
2. CEL
ENGINE REACTION:
Derate 25%
VERIFICATION:
Parked regeneration
POSSIBLE CAUSES:
1. Leaks or damage to the entire exhaust system.
2. Faulty DOC and DPF pressure sensor tubes and elbows for leaks, kinks, or restrictions.
3. Damaged pins.
4. Spread pins.
5. Corroded pins.
6. Faulty DOC inlet pressure sensor.
7. Faulty wiring.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 3251
FMI: 21
Description: Diesel Oxidation Catalyst Inlet / Outlet Pressure – Not Plausible
Troubleshooting:
DESCRIPTION:
Diesel oxidation catalyst (DOC) inlet/outlet pressure not plausible.
MONITORED PARAMETER:
Exhaust pressures
TYPICAL ENABLING CONDITIONS:
Always on
MONITOR SEQUENCE:
None
EXECUTION FREQUENCEY:
Continuous when enabling conditions met.
TYPCIAL DURATION:
Two seconds
DASH LAMPS:
MIL
ENGINE REACTION:
None
VERIFICATION:
Parked regeneration
POSSIBLE CAUSES:
1. Damaged or leaking exhaust system.
2. Damage pins.
3. Spread pins.
4. Corroded pins.
5. Faulty pressure sensor tube.
6. Faulty wiring.
7. Parked regen needed.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 3353
FMI: 2
Description: Generator (Charging System) D+ Terminal Failure
Troubleshooting:
DESCRIPTION:
J1939 charging system D+ terminal failure.
MONITORED PARAMETER:
Battery voltage
TYPICAL ENABLING CONDITIONS:
Always enabled
MONITOR SEQUENCE:
None
EXECUTION FREQUENCEY:
Always enabled
TYPCIAL DURATION:
Two seconds
DASH LAMPS:
CEL
ENGINE REACTION:
None
VERIFICATION:
1. Key off for five minutes.
2. Then key on.
3. Engine off.
POSSIBLE CAUSES:
1. Battery voltage.
2. Common Powertrain Controller (CPC) needs proper configuration.
3. Faulty CPC.
4. CPC needs reprogramming.