Jungheinrich Error Code 1901 Jun 2026

Ensure the pedal returns immediately and fully to the top position when released. If it feels sluggish, the return spring might be damaged. 3. Check the Accelerator Potentiometer and Wiring

| Common Cause | Detailed Explanation | Solution | | :--- | :--- | :--- | | | The sensor, often a Hall effect sensor, may have failed. Internal drift, cold solder joints, or a broken track can cause it to send a continuous signal. | Inspect the pedal sensor and wiring harness. If faulty, the entire pedal assembly may need replacement. | | ⚠️ Mechanical Obstruction | A physical object (e.g., a floor mat, debris, ice in cold storage) might be pressing against the pedal, or the pedal's pivot could be jammed, preventing full return to the 'zero' position. | Remove any obstruction and ensure the pedal moves freely and springs back to its upright position. | | ⚡ Electrical Issues | A broken wire, loose connector, short to ground, or corrosion in the wiring harness can send a stray 'active' voltage to the controller. | Inspect the wiring harness from the pedal to the main controller for any signs of damage, wear, or loose connections. | | 💻 Controller Malfunction | In rarer cases, the analog-to-digital (A/D) converter input on the main controller responsible for reading the pedal signal could be faulty. | Advanced diagnostics with dealer-level software like Jungheinrich's JUDIT-4 are required to test the controller's inputs. | Jungheinrich Error Code 1901

: Turn the key switch to the "OFF" position and then back to "ON" (or re-enter your PIN). Check for Obstructions Ensure the pedal returns immediately and fully to

This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Jungheinrich Forklift Error Codes - Machine Maxx USA Check the Accelerator Potentiometer and Wiring | Common

Jungheinrich typically indicates that the accelerator (drive) pedal was activated during startup . This is a safety feature that prevents the forklift from moving unexpectedly when you turn it on. Resolution Steps

Troubleshooting Jungheinrich Error Code 1901: Accelerator Pedal Activated During Startup