ISX fault 1145

[trdodd07]

Opened up Insite today to check faults and do a regen and found inactive fault 1145 (Injector Solenoid Driver Cylinder 6 - Mechanical system NOT responding or out of adjustment). Going to do a cut out and leak down test, but Is there anything else I could monitor or do to investigate further into this? There is only 1 count of this code, and it didn't even have a MIL or CHK ENG light come on for it. I didn't even know it was there until I got on Insite. Would having filters changed during a PM cause that to come up when trying to prime the system again?