Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 521008
FMI: 14

Description: Engine Brake Lever – Incorrect Parameters
Troubleshooting:
POSSIBLE CAUSES:
DT12 shift stalk lever needs reprogramming.

Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 521012
FMI: 1

Description: Intake Deviation Low
Troubleshooting:
DESCRIPTION:
Intake manifold pressure too low.
MONITORED PARAMETER:
None
TYPICAL ENABLING CONDITIONS:
None
MONITOR SEQUENCE:
None
EXECUTION FREQUENCEY:
None
TYPCIAL DURATION:
None
DASH LAMPS:
MIL
ENGINE REACTION:
25% Derate
VERFICATION:
At operating temperature of 71°C (160°F). Drive at highway speed with loaded trailer above
1130 rpm continuously for five minutes.
POSSIBLE CAUSES:
1. Leaky air intake system.
2. Restricted air intake system.
3. Faulty intake manifold pressure/temperature sensor.
4. Bent pins.
5. Spread pins.
6. Corroded pins.
7. Oil on connector.
8. Fuel on connector.
9. Water damage to connector.
10. Faulty MCM.

Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 521013
FMI: 31

Description: Symmetric Injection Mode Expected
Troubleshooting:
DESCRIPTION:
Symmetric injection mode expected.
MONITORED PARAMETER:
Injector duration ratio.
TYPICAL ENABLING CONDITIONS:
Injector duration ratio greater than 0.5.
MONITOR SEQUENCE:
Engine load greater than 20% and less than 100%, engine speed gradient less than or equal to
200 rpm.
EXECUTION FREQUENCEY:
Five seconds, two times in one drive cycle.
TYPCIAL DURATION:
None
DASH LAMPS:
MIL
ENGINE REACTION:
None
VERFICATION:
None
POSSIBLE CAUSES:
1. Bent pins.
2. Spread pins.
3. Damaged connector seal.

Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 521014
FMI: 19

Description: Stalk Switch Right LIN Communication Error Detected
Troubleshooting:
NOTE: This fault indicates the CPC3 has lost communication with the DT12 shift stalk lever.
POSSIBLE CAUSES:
1. Bent pins.
2. Spread pins.
3. Corroded pins.
4. Faulty wiring.
5. Faulty shift stalk lever.
Page

Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 521015
FMI: 12

Description: Shift Stalk – Internal Hardware Error
Troubleshooting:
NOTE: This fault indicates and internal failure of the DT12 shift stalk lever.
POSSIBLE CAUSES:
Replace the shift stalk lever.

Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 521018
FMI: 0

Description: Group 1 Sensors Not Plausible
Troubleshooting:
DESCRIPTION:
This fault code sets when one or more sensors from group 2 and one or more sensors from
group 3 are not within an expected range after an 8 hour cold soak.
MONITORED PARAMETER:
1. Fuel temp.
2. Engine oil temp.
3. Coolant in
4. Coolant out.
5. Compressor inlet.
6. Charge air cooler outlet.
7. Intake temp.
8. Ambient temp.
TYPICAL ENABLING CONDITIONS:
Key on, engine off, battery voltage greater than 11 volts, engine rpm at zero, ambient
temperature less than 40°C (104°F), ignition off for no less than 8 hours.
MONITOR SEQUENCE:
None
EXECUTION FREQUENCEY:
Once per cold cycle.
TYPCIAL DURATION:
Five seconds
DASH LAMPS:
MIL
ENGINE REACTION:
None
VERFICATION:
Road test the vehicle for 30 minutes until the coolant reaches operating temperature. Then
verify that the engine oil temperature is within 20°C (36°F) of the engine coolant outlet
temperature.
POSSIBLE CAUSES:

1. Reprogramming or time change to the CPC.
2. Usage of an external or aftermarket heating unit.
3. Damaged or corroded sensor connectors.
4. Failed sensor.
5. MCM need an update.
6. Damaged/Faulty sensor electrical connector.

Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 521019
FMI: 0

Description: Group 2 Sensors Not Plausible
Troubleshooting:
DESCRIPTION:
This fault code sets when 2 or more sensors from group 2 are not within an expected range
after an 8 hour cold soak.
MONITORED PARAMETER:
1. Coolant in
2. Coolant out.
3. Intake temp.
4. Ambient temp.
TYPICAL ENABLING CONDITIONS:
Key on, engine off, battery voltage greater than 11 volts, engine rpm at zero, ambient
temperature less than 40°C (104°F), ignition off for no less than 8 hours.
MONITOR SEQUENCE:
None
EXECUTION FREQUENCEY:
Once per cold cycle.
TYPCIAL DURATION:
Five seconds
DASH LAMPS:
MIL
ENGINE REACTION:
25% derate, regen disabled.
VERFICATION:
Road test the vehicle for 30 minutes until the coolant reaches operating temperature. Then
verify that the engine oil temperature is within 20°C (36°F) of the engine coolant outlet
temperature.
POSSIBLE CAUSES:
1. Reprogramming or time change to the CPC.
2. Usage of an external or aftermarket heating unit.
3. Damaged or corroded sensor connectors.
4. Failed sensor.

5. Common Powertrain Controller (CPC) need an update.
6. Damaged/Faulty sensor electrical connector.