The error typically occurs because there is no defined "neutral" position detected in either the drive or lift/lower controls. The sensor cannot reliably distinguish between a resting state and an active command, leading the truck to cut out or disable certain functions (often hydraulics) for safety. Forkliftaction Common Solutions Software Update
Disconnect the resolver connector (usually a 6-pin AMP/Tyco connector near the motor). Set multimeter to Ohms. Measure:
: Inspect the tiller head for obvious backlash or loose components that might prevent the sensor from returning to a true neutral position.