JLG Telehandler 814 Fault Code: Tilt Sensor - Chassis Tilt Sensor Out of Range
Also called Sensor Error Differential Pressure (DPF); Signal Range Check High
Tilt Sensor - Chassis Tilt Sensor Out of Range · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
Code 814 (SPN 3253 / FMI 3) sets when JLG's UGM detects a platform attached, the platform option enabled, and the chassis tilt sensor reading over 19 degrees for 4 seconds while the platform station is active, or the cabin station is active with one or more stabilizers deployed. It blocks platform mode operation and stays active until a power cycle. If it doesn't clear, the board may need replacement.
High severity. Code 814 does not shut the engine down, but it locks out platform mode operation entirely, meaning the machine cannot be used safely in that configuration until the fault is resolved. Treat it as a stop-and-diagnose condition before attempting any platform work.
What does JLG Telehandler error code 814 mean?
Code 814 is JLG's Universal Ground Module (UGM) flagging that the chassis tilt sensor is reading an angle it considers unsafe for platform operation, specifically more than 19 degrees for 4 seconds, while the platform option is enabled and a platform is detected as attached.
This is a safety interlock, not a random electrical glitch. The UGM is designed to prevent platform mode operation if the machine's chassis tilt appears excessive, whether that's because the machine is genuinely tilted, or because the tilt sensor itself is malfunctioning or miscalibrated.
The listed description also references 'Sensor Error Differential Pressure (DPF); Signal Range Check High' alongside the tilt sensor description. Both share the same SPN/FMI (3253/3) and trigger conditions as documented, so operators should treat this as the tilt sensor fault for telehandler platform applications.
What triggers a JLG Telehandler 814 code?
The platform option must be configured as enabled, the UGM must detect a platform attached, and the tilt sensor must read more than 19 degrees for 4 seconds. In addition, either the platform station must be active, or the cabin station must be active with one or more stabilizers deployed.
Common causes of 814
- Chassis actually tilted beyond the allowable angle for platform operation due to uneven ground, soft ground, or improper stabilizer setup
- Faulty or out-of-calibration chassis tilt sensor sending an inaccurate high-angle signal
- Wiring or connector issue at the tilt sensor causing an erratic or out-of-range signal
- Stabilizers not fully deployed or unevenly deployed while operating from the cabin station
- UGM board fault preventing the code from clearing even after the tilt condition is corrected
How to troubleshoot JLG Telehandler 814: first checks
- Check the machine's actual position and levelness. Reposition on firmer, more level ground if the chassis is genuinely tilted
- Confirm stabilizers are fully and evenly deployed if operating from the cabin station
- Inspect the chassis tilt sensor and its wiring harness and connectors for damage, corrosion, or loose pins
- Verify the platform is correctly attached and recognized by the UGM if platform mode is being used
- Attempt a power cycle of the machine after correcting the tilt or sensor issue to see if the fault clears
How the code clears
This fault latches until a power cycle. If cycling power does not clear the code after the tilt condition and sensor are verified good, the board itself may need to be replaced, as no further reset procedure is listed for this code.
Frequently asked questions
What does JLG fault code 814 mean?
It means the UGM has detected the chassis tilt sensor reading more than 19 degrees for 4 seconds while a platform is attached and the platform option is enabled, with the platform station active or the cabin station active with a stabilizer deployed. It blocks platform mode operation.
Can I still drive or use the boom with code 814 active?
The fault specifically prevents platform mode operation. Other machine functions may still work, but always treat any active fault as a signal to stop and diagnose before continuing work, especially anything involving personnel platforms.
How do I clear code 814?
The code latches until a power cycle. Correct the actual tilt condition or sensor fault first, then power cycle the machine. If it does not clear, the board may need replacement since no other reset procedure is listed.
Is code 814 caused by the machine being on uneven ground?
It can be. If the chassis is genuinely tilted beyond the allowed angle, the sensor is doing its job correctly. Reposition the machine on level, stable ground and check stabilizer deployment before assuming a sensor fault.
Why does my stabilizer deployment matter for this code?
The trigger condition includes the cabin station being active with one or more stabilizers deployed. Uneven or partial stabilizer deployment can cause or contribute to an out-of-range tilt reading.
Is this the same as a DPF sensor code?
The description list references a 'Sensor Error Differential Pressure (DPF)' description alongside the chassis tilt sensor description, both under the same SPN 3253 / FMI 3. For telehandler platform applications, treat 814 as the chassis tilt sensor fault described here.