The EJE 120 uses a magnetic or optical encoder on the end of the drive motor. If this sensor gets dirty, wet, or fails electronically, the signal breaks down.
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Inspect the wiring harness that runs through the tiller arm. This area is subject to constant flexing and is a common point for wire fatigue or shorts. 2. Software Calibration (Requires Judit Diagnostic Tool) jungheinrich eje 120 error code 4372 top