If the hardware is physically defective (e.g., corrosion on the circuit board or a faulty "butterfly sensor"), a firmware update won't help. In this case, the entire "Control Head, Upper Part" (the tiller head assembly) must be replaced.
: To prevent the pallet jack from suddenly driving off or dropping a heavy load unpredictably, the software immediately disables the vehicle and flashes a warning symbol on the interface.
Jungheinrich released an official engineering bulletin to address early iterations of this code.
Encountering the Jungheinrich EJE 120 error code 4372 "TOP" can be frustrating, but it is a well-understood and documented issue. The good news is that Jungheinrich recognizes the problem and has clear solutions available. jungheinrich eje 120 error code 4372 top
: Implausible input combination or missing neutral zone.
Here is everything you need to know about Error 4372, what it means, and how to get your truck moving again.
: The internal sensor wheel or potentiometer that tracks how far you push the drive or lift switches may be physically broken, dirty, or worn. If the hardware is physically defective (e
If physical checks reveal no clear mechanical issues, the problem is deep within the truck's electronics. You can resolve it using the following targeted techniques: Apply a Firmware Update (The Top Solution)
Error code 4372 points directly to a problem with the truck's . Essentially, the error indicates that the control system has detected an "implausible" or faulty signal from the tiller head sensor.
For most Jungheinrich EJE 120 owners, means replace the drive motor encoder . It is the weakest link in the speed feedback loop. Order part number Jungheinrich 51457703 (or verify with your serial number), install it, clear the code via the diagnostic menu, and your pallet truck should return to full speed. : Implausible input combination or missing neutral zone
Inspect the mechanical linkage of the tiller arm. Look for:
Based on field reports and Jungheinrich technical bulletins, here is what usually triggers this error: