Detroit DD16 GHG14 (2014-16) Fault Code: SPN 3031 FMI 19 (ACM) Diesel Exhaust Fluid Tank Temperature Signal Erratic via Controller Area Network
NOTE: Please see the step by step troubleshooting procedures for this specific code.
NOTE: If the ACM (Computer module) has been programmed recently, clear code, test drive, and if code doesn’t come back releaes the vehicle.
PROBABLE CAUSES:
1. Check DEF tank header harness connector/wiring.
2. DEF CAN harness.
3. Failed DEF tank header.
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