I've been dealing with since new and have tried to repair a check engine light, which has been on since picking up new from EarthCruiser. They suggested "clicking" the fuel cap, indicating that they have confirmed an evaporative fuel system leak on my vehicles and/or others they have delivered, and EC suggesting that the factory fuel cap must be loose in the factory fuel filler, yet EarthCruiser modifies the factory fuel tank as part of their standard build (CORE or camper). EarthCruiser has refused to loan a code reader to me so that I can check the code/cause of the check engine light, so I procured one that they recommended at my expense for this new vehicle with CEL. The code reader they suggested did not read the Fuso fault code (or any other J1939 info), so I procured another that was able to read the fault codes but unfortunately not much else. I have put a link to it in the notes of this video. I have checked the vent line between the fuel filler and sender/tank, which was reinstalled by EC. It was loose and possibly the cause of the fault, yet the fault has not cleared. I may try clearing the fault myself as EC has not been willing to provide any support. Any other suggestions?