If your EJE 120 uses a weak battery or has corroded battery terminals, the voltage reaching the top module may dip below 18V during a lift command. The logic board requires stable 24V nominal; if it browns out, it stops communicating, throwing code 4372.
The internal sensor card or the traction sensor may need replacement.
Verify that they spring back completely and smoothly into their center (neutral) positions.
Disclaimer: This information is based on user discussions and manufacturer technical documents provided online. Always consult a certified Jungheinrich technician for complex repairs. Discussion: Error 4372 - Forums - Forklift Action jungheinrich eje 120 error code 4372 top
Check for "backlash" (looseness) on the "hairpin" connector in the tiller head. 3. Check Battery Voltage Under Load
The EJE 120 uses an electric lift mast with a for safety and control:
Specifically, the truck’s control unit (ELC) is not receiving a plausible signal from the drive motor’s rotational speed sensor. Because the controller cannot verify how fast the motor is spinning, it triggers a safety response: If your EJE 120 uses a weak battery
On a electric pallet jack, error code 4372 indicates a tiller head sensor malfunction , which specifically signals that the analogue signal is implausible or the control handle's neutral zone is too narrow . When this event triggers, the truck's onboard diagnostics flag a safety mismatch, frequently cutting out hydraulic functions, lift/lower systems, or completely disabling travel capabilities to prevent accidental movement.
Note : If the fault clears and the truck operates temporarily before tripping again when changing direction, the issue points directly to a software window limit or a failing potentiometer position. Step 2: Clean and Inspect Tiller Head Assembly
: The diagnostic patch pushes a firmware flash to the tiller assembly that widens the calibrated neutral-zone safety window. This modification prevents minor voltage drift from triggering an automatic machine lockout. Recalibration via "Teach-In" Verify that they spring back completely and smoothly
A technician flashes new software to expand the neutral zone window.
: Older firmware has a very tight "window" for what it considers a safe neutral signal. If the switch shifts by a millimeter, the truck throws an error. Step-by-Step Troubleshooting Guide
If cleaning does not resolve the error, .