Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 171
FMI: 9
Description: Ambient Air Temperature Signal Not Available Via the Controller Area Network
Troubleshooting:
DESCRIPTION:
Ambient air temperature sensor input loss CAN.
MONITORED PARAMETER:
Ambient temperature
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 cycle: five minutes off.
2. Engine idle: two minutes.
POSSIBLE CAUSES:
ACM/MCM/CPC needs reprogramming.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 171
FMI: 13
Description: Ambient Air Temperature Signal Not Available Via the Controller Area Network
Troubleshooting:
POSSIBLE CAUSES:
ACM/MCM/CPC needs reprogramming
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 171
FMI: 14
Description: Ambient Air Temperature Signal Not Available Via the Controller Area Network
Troubleshooting:
DESCRIPTION:
Ambient air temperature sensor input loss CAN.
MONITORED PARAMETER:
Ambient temperature
TYPICAL ENABLING CONDITIONS:
Always enabled
MONITOR SEQUENCE:
None
EXECUTION FREQUENCEY:
Always enabled
TYPCIAL DURATION:
Two seconds
DASH LAMPS:
CEL
ENGINE REACTION:
None
VERIFICATION:
Key cycle – five minutes off – engine idle (two minutes).
POSSIBLE CAUSES:
ACM/MCM/CPC needs reprogramming.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 171
FMI: 20
Description: Ambient Temperature Sensor Signal Not Plausible
Troubleshooting:
DESCRIPTION:
This fault code sets when the motor control module (MCM) detects that the ambient air
temperature is greater than 20°C (36°F) degrees from the expected temperature after the
engine has been turned off for 8 hours.
MONITORED PARAMETER:
Ambient air temperature.
TYPICAL ENABLING CONDITIONS:
1. Key on.
2. Engine off.
3. Battery voltage greater than 11 volts.
4. Engine rpm at zero.
5. Ambient temperature less than 40°C (104°F)
6. Engine off for no less than 8 hours.
MONITOR SEQUENCE:
None
EXECUTION FREQUENCEY:
Once per cool down cycle.
TYPCIAL DURATION:
5 seconds
DASH LAMPS:
MIL
ENGINE REACTION:
None
VERIFICATION:
Road test the vehicle for 30 minutes until the coolant reaches operating temperature. Then
verify that the ambient temperature is within 10°C (18°F) of the compressor inlet temperature.
POSSIBLE CAUSES:
1. Common Powertrain Controller (CPC) needs reprogramming.
2. Faulty intake ambient temperature sensor.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 174
FMI: 0
Description: Supply Fuel Temperature Too High
Troubleshooting:
POSSIBLE CAUSES:
1. Fuel aeration
2. Fuel tank level
3. Improper fuel pressure
4. Fuel line restrictions
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