Detroit DD13 EPA10 (2010-13) Fault Code: SPN 5017 FMI 3 (ACM) NOx Sensor Digital Output 5 Circuit Signal Failed High

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

PROBABLE CAUSES:
1. NOx sensor.
2. NOx sensor connector/harness.
3. Failed ACM (Aftertreatment Control Module).