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Detroit DD16 GHG14 (2014-16) Fault Code: SPN 171 FMI 2 (CPC) Ambient Temperature Sensor Data Erratic

NOTE: Please see the step by step troubleshooting procedures for this specific code.

PROBABLE CAUSES:
1. Ambient air temperature sensor not programmed correctly in ECM.
2. Ambient air temperature sensor connector/harness.
3. Ambient air temperature sensor.

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