1139 1141 1142 1143 1144 1145 faults

[twinturbo]

Got a 2015 ISX with multiple Injector Solenoid Driver Faults - Mechanical system not responding or out of adjustment. Kenworth dealer replaced the under valve cover harness and the Engine harness because it was oil soaked and they thought that might be the issue. After a few days the codes returned. We checked the return pressure to see if it was restricted. It was not. There is not a lot else in the trouble shooting guide for these codes other than replacing the injectors. Can't believe all 6 injectors are bad. Truck runs great. Any ideas.