Lippert Leveling System: “Excessive Slope”
warning RV leveling system error codes
What it means
The RV is parked on ground that is too far out of level for the system to safely auto-level. On Lippert hydraulic systems (Level-Up, motorhome auto-level) the limit is about 3.5 degrees out of level front-to-rear or side-to-side; beyond that the jacks may not have enough travel to bring the coach level, so the system stops.
Most likely causes
- Coach parked on a site that slopes more than ~3.5 degrees in any direction most likely
- Severe ground angle exceeding jack stroke capability common
- Level/zero point was calibrated incorrectly, so the controller misreads the slope less common
Safe checks you can do yourself
- Confirm visually whether the site is noticeably sloped; move the rig to flatter ground if possible.
- Use the system's manual (jack-by-jack) mode to raise the low side toward level before retrying auto-level.
- Place leveling blocks/boards under the low-side wheels or jacks to reduce the slope the system has to correct.
- Verify the zero/level point has been set correctly per the owner's manual if the message appears on ground that looks flat.
How to reset / clear Excessive Slope
- Acknowledge the message on the touchpad (press Enter/OK).
- Reposition the coach or use manual mode to reduce the slope, then restart the auto-level sequence.
When to call a technician
The message persists on ground that is clearly flat and level, which points to a sensor or zero-point calibration problem rather than the actual slope.
Applies to
Level-Up (motorhome hydraulic auto-level) · Electronic/Hydraulic Leveling with touchpad · Ground Control 3.0 (similar excessive-slope handling)
FAQ
What does Lippert Leveling System code "Excessive Slope" mean?
The RV is parked on ground that is too far out of level for the system to safely auto-level. On Lippert hydraulic systems (Level-Up, motorhome auto-level) the limit is about 3.5 degrees out of level front-to-rear or side-to-side; beyond that the jacks may not have enough travel to bring the coach level, so the system stops.
How do I reset Lippert Leveling System Excessive Slope?
Acknowledge the message on the touchpad (press Enter/OK). Reposition the coach or use manual mode to reduce the slope, then restart the auto-level sequence.
What is the most common cause of Excessive Slope on a Lippert Leveling System?
The most likely cause is coach parked on a site that slopes more than ~3.5 degrees in any direction.
Related · Lippert leveling system
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Sources
- Lippert Components Level-Up Owner's Manual (Error Mode; Excess Slope) — Level-Up Owner's Manual, Troubleshooting / Error Modes, p.10-11 (Lippert Components / ManualsLib)
- LCI Motorized Leveling Unidirectional Owner's Manual — Motorized Leveling Owner's Manual, error/troubleshooting section (Lippert / Forest River)
Note: The exact wording on the display varies by system and firmware ('EXCESSIVE SLOPE', 'EXCESS ANGLE', 'EXCESSIVE ANGLE'). The 3.5-degree threshold is documented for the Level-Up hydraulic system; other Lippert systems use a similar but not necessarily identical limit.
● Last verified 2026-06-29 · compiled from manufacturer documentation. Codes can vary by model year — always cross-check your unit’s manual.