Jungheinrich Error Code 1901 Jun 2026

Conclusion

Jungheinrich forklifts are renowned for their robust engineering and operational efficiency in the demanding world of intralogistics. Their sophisticated on-board diagnostic systems constantly monitor critical functions, translating potential issues into error codes. Among the most commonly encountered by operators is . While seeing any error code on your display can be concerning, this particular code is often one of the easiest to resolve.

What is the of your Jungheinrich truck (e.g., EFG, ETV, EJE)?

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.

Unlike generic OBD codes, Jungheinrich uses proprietary manufacturer-specific codes. generally translates to: Jungheinrich Error Code 1901

. The system should reset, and the error code should disappear. 2. Inspect the Accelerator Pedal Assembly

Before checking components, rule out operator error. Turn off the forklift completely. Remove your foot from all pedals and restart the truck. If the code clears, the issue was just operator timing. 2. Inspect the Pedal Assembly Mechanically Debris often accumulates around forklift floorboards:

Inspect the main contactor tips for pitting, welding, or carbon buildup.

The acceleration pedal (either forward or reverse) is pressed. While seeing any error code on your display

If you try these steps and the 1901 error code remains, the pedal sensor or travel controller may need replacement. Contact an authorized technician to diagnose the electronics safely. To narrow down the problem, let me know:

To eliminate recurring 1901 safety faults, implement the following habits into your daily material handling operations:

stands for "Drive pedal activated during startup" .

: Check the harness connecting the pedal to the main controller for shorts or corrosion. While the code can seem intimidating, most cases

Even if a pedal obstruction is cleared, the system might need a full reset.

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

The CAN bus uses a twisted pair of wires (typically CAN High and CAN Low, often colored orange or yellow in Jungheinrich harnesses). If these wires are chafed, partially cut, or loosely connected at the controller’s 12-pin or 35-pin connector, intermittency occurs.

Check the voltage again while attempting to operate a hydraulic function to see if the voltage sags below the minimum operating threshold (typically 80% of nominal voltage).