Detroit DD16 GHG14 (2014-16) Fault Code: SPN 639 FMI 14 (CPC) Data Link Failure
NOTE: Please see the step by step troubleshooting procedures for this specific code.
NOTE: If other codes are present, fix those first. Otherwise, check other modules for codes as well and communication status. Fix those first.
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Allison 1000 & 2000 Gen 4 Fault Codes: U1301 J1850 (Class 2) Serial Data Communication Link Low
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