The potentiometer or Hall effect sensor that measures pedal position is out of alignment, causing it to send a "pressed" signal even when it is not.
Moisture ingress from wet warehouse floors or pressure washing corrodes the small pins inside the motor connector. Code 1901 often appears after cleaning.
Switch the truck back on without touching the accelerator. If the code clears, it was a transient operational error. Step 2: Inspect the Physical Pedal Assembly Jungheinrich Error Code 1901
💡 : If error 1901 occurs alongside other codes like 1904 (no travel direction) or 1908 (seat switch open), it often points to a general startup sequence error rather than a mechanical failure. If you'd like to troubleshoot further, could you tell me:
Report any sticky or sluggish pedal behavior to maintenance immediately. The potentiometer or Hall effect sensor that measures
is a specific, actionable fault indicating a CAN Bus timeout with the drive controller. While the code can seem intimidating, most cases stem from simple issues: loose battery connections, a chafed wire, or a low-voltage battery. By methodically checking power supply, CAN bus resistance, and connector integrity, 70% of occurrences can be resolved without replacing expensive components.
* 1901.1 – Drive pedal activated during startup. * 2951.1 – Hydraulic function activated during startup. Machine Maxx USA Jungheinrich Forklift Truck Fault Codes DTC.pdf Switch the truck back on without touching the accelerator
Use compressed air to clean out the pedal well during weekly cleanings.
If you are dealing with a persistent 1901 code despite a clean pedal mechanism, you may need a system reset. Would you like to know the specific to access the service menu for your specific Jungheinrich model, or do you need help identifying the part numbers for a replacement travel sensor? Share public link