You need a multimeter, a Jungheinrich analyst cable (COM2/J1939), and preferably the Jungheinrich "Diagnostic Software" (JST). However, basic field diagnostics are possible.
Do not simply reset the code. You must fix the underlying cause. jungheinrich eje 120 error code 4372
No. Jungheinrich safety logic will disable drive power. The parking brake will either remain locked (if it failed to release) or, more dangerously, fail to engage. Never bypass or reset this code without a proper repair — an uncontrolled runaway pallet truck is a severe workplace hazard. You need a multimeter , a Jungheinrich analyst
A seized drive wheel bearing, a bent motor shaft, or debris wrapped around the drive unit hub creates physical resistance. The motor tries to turn, but the load is too high. The speed drops, and 4372 appears. You must fix the underlying cause