Ensure your foot is completely off the accelerator pedal.
Jungheinrich forklifts are renowned for their reliability and advanced engineering, but like any sophisticated machinery, they can encounter error codes that halt operations. One common error code operators might encounter is , which is often referred to simply as the 1901 code in the field.
The zip ties had been pulled too tight during a previous repair. Over months of vibration, the tight plastic had bitten into the insulation of the CAN High wire. It wasn't a clean break—it was an intermittent short against the chassis ground. Every time the steering wheel turned to a specific angle, the wire grounded out, silencing the data signal. Jungheinrich Error Code 1901
This usually requires a maintenance technician to check the signal values on the dash display or with a handheld diagnostics tool to confirm if the sensor is reporting 0% when the pedal is idle. 4. Check Wiring Harness
Jungheinrich Error Code 1901 a specific event message indicating that the Ensure your foot is completely off the accelerator pedal
On many Jungheinrich models, error 1901 can trigger if the sensor wheel is wobbling or the gap between the sensor and the sensor wheel is too large .
Inspect the return spring to ensure it is intact and holds enough tension. 3. Verify the Wiring and Connectors Electrical resistance can trigger false sensor signals: The zip ties had been pulled too tight
: Fully release the accelerator pedal to its neutral position.
Physically lift the pedal with your foot to see if it moves higher. If it does, the return spring may be faulty. 3. Check for Miscalibration (Technical)
: If the wiring is intact but the signal remains constant, the pedal potentiometer or the traction controller itself may need to be tested or replaced by a technician. sd95d2cbd361a0b8d.jimcontent.com Related Operational Codes
Error 1901 is part of a series of startup and safety interlock codes. For instance: