Detroit DD13 EPA07 (2007-09) Fault Code: SPN 1624 FMI 19 (CPC) Tachograph Vehicle Speed Signal is Erratic
NOTE: Please see the step by step troubleshooting procedures for this specific code.
NOTE: If any battery voltage codes present, first those first. If code 625-9 active, fix that before proceeding as well.
PROBABLE CAUSES:
1. CPC recently programmed incorrectly.
2. Another computer on the truck is the cause of the problems (ABS, Transmission, etc…).
![DOOSAN DMS-5 3.1.3 [2023.11] diagnostic software](https://www.ecuforcetruck.com/wp-content/uploads/2023/11/1-300x300.png)
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