Detroit DD15 GHG14 (2014-16) Fault Code: SPN 629 FMI 12 (CPC) Multiple Fault Descriptions
NOTE: The troubleshooting solution is the same for any and all fault descriptions.
POSSIBLE CAUSES:
1. The common powertrain controller (CPC).
2. Needs software update.
NOTE: Reprogram the CPC with the latest software release.
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