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If the pedal returns physically but the error persists, the electronic sensor might be sending a false signal.
: Debris, such as small stones or floor litter, may be wedged under the pedal, preventing it from returning to its fully upright neutral position.
: A malfunction in the pedal's electronic sensor or a miscalibration can cause the controller to receive a "pressed" signal even when the pedal is physically at rest. Troubleshooting and Solutions Follow these steps to diagnose and clear the 1901 error: Jungheinrich Forklift Error Codes - Machine Maxx USA Jungheinrich Error Code 1901
A weakened or broken spring that fails to pull the pedal back to neutral.
: Ensure you are following the correct startup sequence: sit in the seat, secure the seatbelt (if required), turn on the truck, and apply the accelerator. Potential Underlying Issues
, are designed to prevent accidental movement when the operator turns the key or enters their code. If the system detects that the accelerator is already pressed down, it will lock out the drive function to avoid sudden, unintended acceleration. Machine Maxx USA Troubleshooting & Resolution To clear the 1901 error, follow these steps: Release the Pedal : Completely remove your foot from the accelerator pedal. Restart the Truck Troubleshooting and Solutions Follow these steps to diagnose
If the code persists after a restart and physical inspection, the issue is likely a or a wiring harness failure . These require specialized diagnostic tools to calibrate or replace. You can refer to the Jungheinrich Operating Manuals Database0;4a1; 0;850; for series-specific electrical diagrams. 18;write_to_target_document7;default0;a76;18;write_to_target_document1a;_GxjuaaCCDKeP8L0P1LrdkAo_20;16;
This article provides a comprehensive guide to understanding, troubleshooting, and resolving the 1901 error code, focusing on safe operation and maintenance. What Does Error 1901 Mean?
If the sensor is fine, the controller may be getting a bad signal due to wiring issues. Check for frayed or disconnected wires around the pedal assembly. When to Call a Technician If the system detects that the accelerator is
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Error 1901 is rarely the only code an operator sees. It often appears alongside other informational messages, as these codes share a common theme: operator input at startup. Recognizing these related codes can provide a more complete picture of the issue.