Where do I find the error code on my Cummins Engine?
Where do I find the error code on my Cummins Engine? In addition, trouble codes can be active (current) or inactive (irrelevant). Error codes are displayed on the instrument panel while the machine is moving. They are displayed either with flashing indicators, cuddles, or, on more modern machines, on a digital display. How to check the DTCs of a Cummins Engine? To check the DTCs of the electronic fuel supply system and the engine protection system, turn the diagnostic key to the OFF position and the diagnostic switch to the ON position. Turn the car key to the ON position....