Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 520372
FMI: 14
Description: Selective Catalyst Reduction Closed Loop Control at Maximum Limit (Timeout)
Troubleshooting:
DESCRIPTION:
The fault indicates low Diesel Exhaust Fluid (DEF) delivery.
MONITORED PARAMETER:
NOx conversion efficiency.
TYPICAL ENABLING CONDITIONS:
Closed loop DEF dosing.
MONITOR SEQUENCE:
None
EXECUTION FREQUENCEY:
Always enabled
TYPCIAL DURATION:
Two seconds
DASH LAMPS:
None
ENGINE REACTION:
None
VERFICATION:
Parked SCR efficiency test.
POSSIBLE CAUSES:
1. DEF tank needs cleaning or flushing.
2. Faulty DEF dosing unit.
3. Faulty Inlet NOx sensor.
4. Faulty Outlet NOx sensor.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 520378
FMI: 0
Description: Aftertreatment Temperature Not Plausible
Troubleshooting:
DESCRIPTION:
This fault sets when more than one aftertreatment temperature sensor drifts greater than 70°C
(126°F ).
MONITORED PARAMETER:
Diesel Oxidation Catalyst (DOC) inlet/outlet temperature vs. Diesel Particulate Filter (DPF)
outlet vs. Selective Catalyst Reduction (SCR) outlet temperature.
TYPICAL ENABLING CONDITIONS:
Ignition off 8-hour then cycled on for 60 seconds, battery voltage above
10.98 V.
MONITOR SEQUENCE:
None
EXECUTION FREQUENCEY:
Once per 8-hour cold soak.
TYPCIAL DURATION:
60 seconds
DASH LAMPS:
1. MIL
2. AWL
ENGINE REACTION:
None
VERFICATION:
Ignition off/ 8-hour cold soak.
POSSIBLE CAUSES:
Faulty temperature sensors.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 520381
FMI: 2
Description: DOC Inlet Temperature Not Plausible
Troubleshooting:
DESCRIPTION:
This fault sets if DOC inlet temperature is 70°C (126°F) higher compared to all other
aftertreatment temperature sensors after 8-hour cold soak.
MONITORED PARAMETER:
Diesel Oxidation Catalyst (DOC) inlet temperature versus all other ATS temperature sensors.
TYPICAL ENABLING CONDITIONS:
Engine off for more than 8 hours, battery voltage greater than 10.98 V, ignition on longer than
60 seconds.
MONITOR SEQUENCE:
Key on; engine off for more than 60 seconds.
EXECUTION FREQUENCEY:
Continuous when enabling conditions met.
TYPCIAL DURATION:
2 seconds
DASH LAMPS:
MIL
ENGINE REACTION:
None
VERFICATION:
Ignition off/ 8-hour cold soak.
POSSIBLE CAUSES:
1. Spread pins.
2. Damaged pins.
3. Corrosion pins.
4. Fretting pins.
5. Faulty DOC inlet temperature sensor.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 521001
FMI: 14
Description: Automatic Gear Selection: Gear Shift Not Plausible
Troubleshooting:
POSSIBLE CAUSES:
Faulty Anti-lock Brake (ABS) system.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 521002
FMI: 14
Description: DT12 Automatic Mode not Available
Troubleshooting:
POSSIBLE CAUSES:
Transmission Control Module (TCM), Aftertreatment Control Module (ACM), Motor Control
Module (MCM), or Common Powertrain Controller (CPC) need updating.