I have an L5460 HSTC. It has a little over 2250 hours on it. I have trouble starting it. It will occasionally start when it’s cold. Then it is impossible to start it when it’s warm. I have replaced the glow plugs, glow plug relay, verified it’s getting fuel, have no error codes, no blow fuses, and put a jump box on to ensure proper battery. Went in the test mode. The sensors are acting right. At this point i am thinking it is a sensor but which one. Wouldnt there be an error code. The engine does not overheat either.