Since around 2022, there have been multiple reports of the Cummins QSL9 engine platform experiencing issues with shorted injector leads that lead to de-rated engine performance. Turns out, the issues are easy to mitigate by simply re-positioning the injector tab leads so that they better clear the injector.
Below id the fault typically seen by the operator:
FAULT: Injector Solenoid Driver Cylinder #X Circuit Current Below Normal or Open Circuit
To resolve the issues, locate the cylinder that the fault alarm is pointing to and simply raise the tabs off of the injector to resolve the short. In best practice, it would be prudent to raise the tabs of ALL the injectors to avoid future injector issues.
