Lippert EXTERNAL SENSOR fault code — Leveling system
Applies to: Ground Control TT OneControl, 3K/3K TT leveling, 3K/5K TT leveling, 5K/5K TT leveling
What EXTERNAL SENSOR means
The Lippert Ground Control TT OneControl owner manual lists EXTERNAL SENSOR as bad connection or wiring to the rear remote sensor.
Owner-safe checks
- Stop automatic leveling.
- Record the message for service.
Service-only work
- Harness checks, fuse checks, controller placement, sensor placement, zero-point calibration, homing, jack service, and motor/controller repairs should be handled by a trained RV technician.
Safety boundary
Operate only with people, pets, and property clear of the trailer and jacks. Do not lift the trailer fully off the ground or use the leveling system for service support.