Error code on a Jungheinrich EJE 120 (and related models like the ELE 120) typically indicates an abnormal tiller head signal , often specifically related to an "implausible" neutral zone in the drive or lift/lower controls . This fault generally prevents the truck from operating as a safety precaution, as the controller cannot verify the true "zero" or neutral position of the tiller's steering or traction sensors. Understanding Error 4372