Detroit DD15 EPA07 (2007-09) Fault Code: SPN 973 FMI 19 (CPC) Engine Retarder Selection Signal is Erratic
NOTE: Please see the step by step troubleshooting procedures for this specific code.
NOTE: If codes 168-0, 168-14, or 168-18 active fix those first.
NOTE: If ECM has been programmed recently, check programming to ensure it is correct.
NOTE: This code is coming from another computer on the vehicle (ABS, Transmission, etc…).
![JOHN DEERE PARTS ADVISOR & HITACHI 2.24.2 [2023.07] - ECUFORCETRUCK EPC](https://www.ecuforcetruck.com/wp-content/uploads/2023/09/1-300x300.png)
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