Jungheinrich Error Code 1901 //free\\ Page

A: No. The code is stored in non-volatile EEPROM. A battery disconnect only temporarily clears the active warning; the fault will return at the first turn of the steering wheel if the physical problem remains.

: If the error persists without the pedal being touched, inspect the potentiometer (the sensor on the pedal) and its plug for corrosion or disconnection. Jungheinrich Error Code 1901

This is a safety-related event message that occurs when the system detects the accelerator pedal is already depressed at the moment the key switch is turned on. Causes and Solutions Potential Cause Recommended Action : If the error persists without the pedal

If the pedal is physically up but the code persists, the electronic sensor (potentiometer) that tracks pedal position may be faulty or out of calibration, signaling that it's "pressed" when it isn't. Related Startup Codes Related Startup Codes If the steering system has

If the steering system has been mechanically adjusted (e.g., after a tie rod replacement) without recalibrating the sensor, the control unit will see a mismatch between the commanded zero and the actual sensor reading. This triggers Code 1901 immediately upon startup.

Specifically, 1901 usually indicates that the main vehicle controller has lost communication with a subordinate component—most often the or the Hydraulic Control Unit . The machine initiates a "Safe State" (stopping all motion) to prevent an accident, resulting in the error code.