Detroit DD15 GHG14 (2014-16) Fault Code: SPN 986 FMI 13 (CPC) CPC has Received A J1939 CM1 Message
NOTICE: This fault does not indicate a common powertrain controller (CPC) issues, do not replace the CPC.
NOTE: J1939 CM1 SPN 986 signal source #1 or #2 is missing.
NOTE: This fault indicates that the CPC has received a J1939 CM1 message; however the “SPN 986 requested fan percent speed” data signal is not available.
NOTE: If codes 168-0, 168-14, or 168-18 active fix those first.
NOTE: If ECM has been programmed recentely, check programming to ensure it is correct.
NOTE: This code is comnig from another computer on the vehicle (ABS, Transmission, etc…).
![JOHN DEERE PARTS ADVISOR & HITACHI 2.24.2 [2023.07] - ECUFORCETRUCK EPC](https://i0.wp.com/www.ecuforcetruck.com/wp-content/uploads/2023/09/1.png?resize=300%2C300&ssl=1)
![JOHN DEERE PARTS ADVISOR & HITACHI 2.24.2 [2023.07] - ECUFORCETRUCK EPC](https://www.ecuforcetruck.com/wp-content/uploads/2023/09/2.png)
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