Make: Detroit
Engine: DD8 GHG17 (2017 & Newer)
PID: N/A
SPN: 1761
FMI: 18
Description: Diesel Exhaust Fluid (DEF) Tank Level 1 Conditions – Empty Tank
Troubleshooting:
DESCRIPTION:
DEF Tank Level 1 – Empty
MONITORED PARAMETER:
DEF Tank level
TYPICAL ENABLING CONDITIONS:
DEF Tank level less than 2.5%
MONITOR SEQUENCE:
None
EXECUTION FREQUENCY:
Continuous when enabling conditions met
TYPICAL DURATION:
10 minutes
DASH LAMPS:
MIL, CEL
ENGINE REACTION:
Derate 25%
VERIFICATION:
Engine Idle (five minutes)
POSSIBLE CAUSES:
DEF Tank is empty.
Make: Detroit
Engine: DD8 GHG17 (2017 & Newer)
PID: N/A
SPN: 3056
FMI: 2
Description: Selective Catalyst Reduction Inlet NOx Sensor – Error
Troubleshooting:
DESCRIPTION:
Selective Catalyst Reduction (SCR) Inlet NOx Sensor error
MONITORED PARAMETER:
SCR Inlet NOx
TYPICAL ENABLING CONDITIONS:
1000 to 1800 rpm, 35 to 100% load, Steady cruise
MONITOR SEQUENCE:
None
EXECUTION FREQUENCY:
Continuous when enabling conditions met
TYPICAL DURATION:
Eight minutes
DASH LAMPS:
MIL
ENGINE REACTION:
None
VERIFICATION:
1000 to 1800 rpm, 35 to 100% load, Steady cruise, Eight minutes
POSSIBLE CAUSES:
If multiple faults are present, troubleshoot these faults first.
A faulty SCR Inlet NOx Sensor may result in this fault.
Make: Detroit
Engine: DD8 GHG17 (2017 & Newer)
PID: N/A
SPN: 3216
FMI: 21
Description: Selective Catalyst Reduction (SCR) Inlet NOx Sensor – Drift (Low Box)
Troubleshooting:
DESCRIPTION:
This code sets when the Inlet NOx Sensor reading has detected a low drift condition, within the
enabling conditions.
MONITORED PARAMETER:
Aftertreatment Inlet NOx Sensor
TYPICAL ENABLING CONDITIONS:
1. EGR Mass Flow greater than .08 kg/s
2. Engine Speed 1450 to 1900 rpm
3. Engine Torque 1400 to 2100 N·m (1.03 to 1.55 lb. ft)
4. Battery Voltage greater than 11 V
5. Coolant Temperature greater than 65°C (149°F)
6. Ambient Temperature greater than -8°C (18°F) ambient
7. Barometric Pressure greater than 755 mbar
8. Engine NOT in Regeneration Mode
MONITOR SEQUENCE:
None
EXECUTION FREQUENCY:
Always enabled
TYPICAL DURATION:
1.2 seconds
DASH LAMPS:
MIL
ENGINE REACTION:
None
VERIFICATION:
1. Warm up Engine such that Coolant Temperature greater than 65°C (149°F).
2. Ensure Engine is not in Regeneration Mode.
3. Ensure Ambient Temperature is greater than -8°C (18°F) and Barometric Pressure is greater
than 755 mbar.
POSSIBLE CAUSES:
Page 1
Diagnostic Trouble Code Solutions 04/03/2023 8:51:54
If EGR System faults are present, troubleshoot them first.
1. Leaking or damaged Charge Air Cooler (CAC)
2. Leaking or damaged Exhaust System, Air Inlet, and/or EGR System
3. Faulty Fuel Injector
4. Leaking or damaged Aftertreatment System (ATS) Exhaust
5. Damaged, bent, spread, corroded or unseated (pushed out) pins, signs of moisture in the
connector or wire damage near the connector on Inlet NOx Sensor and wiring connector
6. Faulty SCR Inlet NOx Sensor
Make: Detroit
Engine: DD8 GHG17 (2017 & Newer)
PID: N/A
SPN: 1761
FMI: 2
Description: Diesel Exhaust Fluid (DEF) Tank Level Sensor Circuit – Data Erratic, Intermittent
or Incorrect
Troubleshooting:
DESCRIPTION:
DEF Tank Level Sensor Circuit erratic, intermittent or incorrect
MONITORED PARAMETER:
DEF Tank Level Sensor
MONITOR SEQUENCE:
None
EXECUTION FREQUENCY:
Continuous when enabling conditions met
TYPICAL DURATION:
10 minutes
DASH LAMPS:
MIL
ENGINE REACTION:
None
VERIFICATION:
Engine Idle (five minutes)
POSSIBLE CAUSES:
1. Bent, spread or corroded pins on DEF Tank Temperature / Level Sensor
2. Short to power between the harness side of DEF Tank Temperature / Level Sensor and
Aftertreatment Control Module (ACM) 120-pin connector
3. Faulty wiring between the harness side of DEF Tank Temperature / Level Sensor and ACM
120-pin connector
4. Bent, spread or corroded pins on DEF Tank Temperature / Level Sensor connector
5. Faulty DEF Tank Temperature / Level Sensor
Make: Detroit
Engine: DD8 GHG17 (2017 & Newer)
PID: N/A
SPN: 1761
FMI: 3
Description: Diesel Exhaust Fluid Tank Level Sensor Circuit Failed High
Troubleshooting:
DESCRIPTION:
Diesel Exhaust Fluid (DEF) Tank Level Sensor Circuit failed high
MONITORED PARAMETER:
DEF Tank Level Sensor
TYPICAL ENABLING CONDITIONS:
Always enabled
MONITOR SEQUENCE:
None
EXECUTION FREQUENCY:
Always enabled
TYPICAL DURATION:
Two seconds
DASH LAMPS:
MIL, CEL
ENGINE REACTION:
None
VERIFICATION:
Engine Idle (one minute)
POSSIBLE CAUSES:
1. Bent, spread or corroded pins on DEF Tank Level / Temperature Sensor connector
2. Short to power between DEF Tank Level / Temperature connector and 120-pin ACM
connector
3. Bent, spread or corroded pins on 120-pin Aftertreatment Control Module (ACM) harness side
connector
4. Faulty wiring between DEF Tank Level / Temperature Sensor connector and 120-pin of the
ACM connector
5. Faulty ACM
6. Faulty DEF Tank Temperature / Level Sensor
Make: Detroit
Engine: DD8 GHG17 (2017 & Newer)
PID: N/A
SPN: 1761
FMI: 4
Description: Diesel Exhaust Fluid Tank Level Sensor Circuit Failed Low
Troubleshooting:
DESCRIPTION:
Diesel Exhaust Fluid (DEF) Tank Level Sensor Circuit failed low
MONITORED PARAMETER:
DEF Tank Level Sensor
TYPICAL ENABLING CONDITIONS:
Always enabled
MONITOR SEQUENCE:
None
EXECUTION FREQUENCY:
Always enabled
TYPICAL DURATION:
Two seconds
DASH LAMPS:
MIL, CEL
ENGINE REACTION:
None
VERIFICATION:
Engine Idle (one minute)
POSSIBLE CAUSES:
1. Damage, corrosion or water present on DEF Tank Temperature / Level Sensor connector
2. Faulty wiring between DEF Tank Temperature / Level Sensor connector and 120-pin ACM
connector
3. Faulty DEF Tank Temperature / Level Sensor
4. Faulty ACM