Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 520368
FMI: 14
Description: Selective Catalyst Reduction Outlet NOx Sensor Circuit Failed Open
Troubleshooting:
DESCRIPTION:
This code sets when there is a open on the SCR NOx Outlet circuit Between the sensor and
the ECU.
MONITORED PARAMETER:
SCR Outlet NOx sensor.
TYPICAL ENABLING CONDITIONS:
Dewpoint enabled.
MONITOR SEQUENCE:
None
EXECUTION FREQUENCEY:
Continuous when enabling conditions met.
TYPCIAL DURATION:
3 seconds
DASH LAMPS:
1. MIL
2. CEL
ENGINE REACTION:
10% Derate
VERFICATION:
Parked regen
POSSIBLE CAUSES:
1. Bent pins.
2. Spread pins.
3. Corroded pins.
4. Faulty SCR Outlet NOx sensor.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 520368
FMI: 31
Description: Selective Catalyst Reduction Outlet NOx Sensor Circuit Failed High
Troubleshooting:
DESCRIPTION:
This code sets when there is a short to power on the SCR Outlet NOx circuit between the
Sensor and ECU.
MONITORED PARAMETER:
SCR Outlet NOx sensor.
TYPICAL ENABLING CONDITIONS:
Dewpoint enabled.
MONITOR SEQUENCE:
None
EXECUTION FREQUENCEY:
Continuous when enabling conditions met.
TYPCIAL DURATION:
3 seconds
DASH LAMPS:
1. MIL
2. CEL
ENGINE REACTION:
10% Derate
VERFICATION:
Parked regen
POSSIBLE CAUSES:
1. Bent pins.
2. Spread pins.
3. Corroded pins.
4. Faulty SCR Outlet NOx sensor.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 520371
FMI: 16
Description: Selective Catalyst Reduction Closed Loop Control at Maximum Limit (Multiples
Sources)
Troubleshooting:
DESCRIPTION:
The fault indicates high 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.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 520372
FMI: 16
Description: Selective Catalyst Reduction Closed Loop Control at Maximum Limit
Troubleshooting:
DESCRIPTION:
The fault indicates high 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:
MIL
ENGINE REACTION:
None
VERFICATION:
Parked SCR efficiency test.
POSSIBLE CAUSES:
1. ACM software configuration needs updated.
2. Faulty DEF dosing unit.