When error 4372 is active, the operator will typically observe the following:
Refer to the specific wiring diagram for your serial number, typically found inside the truck covers.
Error code on a Jungheinrich EJE 120 typically indicates a problem with the neutral zone settings in the tiller head
Before performing any work, ensure the truck is on a level surface, the forks are fully lowered, and the battery is disconnected (remove the plug or disconnect the main fuse).
For the operator, the "work" involved in an error code situation has shifted. Previously, an operator might have attempted to "force" the machine to work, potentially causing secondary damage. The EJE 120’s protocol prevents this; the system safeguards itself by shutting down non-essential functions or stopping entirely to prevent thermal overload or electrical damage.
Jungheinrich is aware of this common issue and typically resolves it with a software update for the tiller head firmware. This update expands the "neutral window" so the sensor is less sensitive to minor calibration drifts.
Error 4372 on a Jungheinrich EJE 120 typically indicates a fault in the traction control / drive electronics communication or a motor-driver-related issue (intermittent communication, overheating or sensor fault). Follow this step-by-step guide to diagnose, isolate, and resolve the fault safely.