Press the pedal and ensure it returns swiftly and fully to the top. If it sticks, lubricate the pivot points or clean the mechanism. 3. Check the Potentiometer/Sensor
Ensure the parking brake is fully released (Error 1909.1 is also related to pedal activation while the brake is engaged).
of any obstructions and that your foot is not touching it. Jungheinrich Error Code 1901
indicates that the drive pedal was activated during the forklift's startup sequence . This is a built-in safety feature designed to prevent the industrial truck from moving unexpectedly when the key switch or power button is turned on. When the electronic control unit detects a voltage signal from the accelerator pedal sensor before the diagnostic self-test completes, it triggers fault code 1901.1 and immediately inhibits travel to protect the operator and nearby warehouse personnel.
Troubleshooting Jungheinrich Error Code 1901: Causes and Solutions 0;16; 0;735;0;ad0; Press the pedal and ensure it returns swiftly
On some Jungheinrich motors, the sensor is replaceable without removing the motor. On others (sealed units), you must replace the entire motor stator.
If you are seeing similar numbers, they often relate to other "illegal" startup or operating conditions: : No travel direction selected while the pedal is pressed. Check the Potentiometer/Sensor Ensure the parking brake is
This article provides a comprehensive guide to understanding Error 1901, detailing its causes, symptoms, step-by-step troubleshooting procedures, and valuable tips to prevent it from happening again.
A damaged wiring harness or loose connection between the pedal and the main controller. 0;2a;
Adhere to the recommended servicing schedule provided by Jungheinrich.