JLG Scissor Lift 825 Fault Code: LSS Has Not Been Calibrated
Also called Platform Load Sense - LSS Has Not Been Calibrated
LSS Has Not Been Calibrated · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
Code 825 means the Load Sensing System (LSS) module has not been calibrated on a machine where the platform option is enabled and a platform is detected as attached. The UGM (Universal Ground Module) shuts down all boom and platform functions and shows a platform overloaded screen until a valid calibration is done or the load sensing menu is set to none and power is cycled.
High severity. The machine will not move any lift, telescope, or rotate function while this fault is active. It is a functional lockout rather than a mechanical failure, but it stops all work until corrected.
What does JLG Scissor Lift error code 825 mean?
Code 825 fires when the platform load sense system on a JLG scissor lift has never been calibrated, or the calibration was lost, while the platform station is active, the platform option is enabled, and the machine detects a platform attached.
Because the controller cannot trust an uncalibrated load sensing module to correctly judge platform weight, it treats the machine as being in distress and locks out every boom and platform motion function: lift up, lift down, telescope in and out, platform rotate left and right, and platform level up and down. It also deactivates the platform module output at J2-19, which disables the function enable relay, and puts a platform overloaded screen on the cabin LCD.
This is a safety interlock, not a sensor failure by itself. The machine is telling the operator that the load sensing system cannot verify platform load until it is calibrated.
Common causes of 825
- The LSS module has never been through a calibration procedure since installation or replacement.
- A previously valid calibration was cleared or lost, for example after a module replacement or reset.
- The load sensing menu screen has not been configured to a valid setting for the machine's platform setup.
How to troubleshoot JLG Scissor Lift 825: first checks
- Confirm the platform station is active and a platform is physically attached and recognized by the machine.
- Check whether the load sensing menu screen setting matches the actual machine configuration (platform option enabled with LSS, or set to none if no LSS is used).
- Inspect LSS module wiring and connectors for damage or corrosion if calibration will not complete or hold.
- Verify the platform is empty before attempting calibration, since the calibration procedure requires an empty platform.
How the code clears
With the platform empty, run the LSS calibration procedure until it completes successfully. The fault latches until a valid calibration of the LSS module is completed, or until the load sensing menu screen is set to none and the machine's power is cycled. No other reset procedure is listed for this code.
Frequently asked questions
What does JLG fault code 825 mean?
It means the platform load sensing system (LSS) module has not been calibrated on a machine that has the platform option enabled and a platform detected as attached. Until calibration is completed, the controller locks out lift, telescope, rotate, and level functions.
Why did all my boom functions stop working with code 825?
The UGM deactivates and inhibits lift up, lift down, telescope in, telescope out, platform rotate left and right, and platform level up and down outputs whenever this fault is active. This is intentional until the load sensing calibration issue is resolved.
How do I clear fault code 825 on a JLG scissor lift?
Empty the platform completely, then run the LSS calibration procedure to completion. If your setup does not use load sensing, you can instead set the load sensing menu screen to none and cycle power to the machine.
Does the platform need to be empty to calibrate the LSS?
Yes. The check procedure specifically calls for an empty platform before calibrating the LSS module.
Can I bypass code 825 by disabling the load sensing system?
Setting the load sensing menu screen to none and cycling power will clear the latch if the machine is not meant to use load sensing. This should only be done if that configuration matches how the machine is actually equipped and used.
Is code 825 a sensor failure or a setup issue?
It is a setup and calibration issue, not necessarily a failed sensor. The fault simply indicates the LSS module calibration has not been completed for a platform that the machine detects as attached with the platform option enabled.