Diagnostics
JLG Telehandler Fault Codes: Meanings, Causes & Fixes
In-depth, plain-English guides to JLG Telehandler fault codes and error codes. Each guide covers what the code means, what triggers it, the most common causes, and the first things to check before you call the dealer.
- 214Power Up - Function Enable Inputs - Invalid Signal States
- 2315Ground Controls - Operating Mode Interlock - Stabilizers Not Deployed
- 2317Ground Controls - Operating Mode Interlock - Chassis Not Level
- 2336Ground Controls - Load Moment Shutoff Input - Invalid Signal
- 2343Ground Controls - Boom Angle Sensor - Not Calibrated
- 2344Ground Controls - Boom Angle Sensor - Out of Range High
- 2345Ground Controls - Boom Angle Sensor - Out of Range Low
- 2346Ground Controls - Boom Angle Sensor - Not Responding
- 2349Ground Controls - Lift Angle Derated - Stabilizers Not Deployed
- 2353Ground Controls - Boom Angle Sensor - Internal Failure
- 2527Function Prevented - Excessive Boom Angle for Hydraulic Quick Connect Operation
- 2528Function Prevented - Platform Attached - Hydraulic Quick Connect Cutout
- 2533Function Prevented - Platform Attached Angle Limit Exceeded
- 2560Function Prevented - Boom Retracted Sensor Faulty - Sensing Invalid
- 33181UGM Output Drivers - Main Lift Up Valve - Open Circuit
- 33183UGM Output Drivers - Main Lift Up Valve - Short to Ground
- 33184UGM Output Drivers - Main Lift Down Valve - Open Circuit
- 33185UGM Output Drivers - Main Lift Down Valve - Short to Ground
- 33186UGM Output Drivers - Main Telescope Out Valve - Open Circuit
- 33188UGM Output Drivers - Main Telescope Out Valve - Short to Ground
- 33189UGM Output Drivers - Main Telescope In Valve - Open Circuit
- 33190UGM Output Drivers - Main Telescope In Valve - Short to Ground
- 33193UGM Output Drivers - Fork Tilt Up Valve - Short to Ground
- 33194UGM Output Drivers - Fork Tilt Down Valve - Open Circuit
- 33195UGM Output Drivers - Fork Tilt Down Valve - Short to Ground
- 33196UGM Output Drivers - Auxiliary Function - A Valve - Open Circuit
- 33198UGM Output Drivers - Auxiliary Function - A Valve - Short to Ground
- 33199UGM Output Drivers - Auxiliary Function-B Valve - Open Circuit
- 33200UGM Output Drivers - Auxiliary Function-B - Short to Ground
- 33201UGM Output Drivers - Stabilizer/Frame Level Speed Valve - Open Circuit
- 33203UGM Output Drivers - Stabilizer/Frame Level Speed Valve - Short to Ground
- 33225UGM Output Drivers - Left Stabilizer Up Valve - Open Circuit
- 33231UGM Output Drivers - Right Stabilizer Up Valve - Open Circuit
- 33240UGM Output Drivers - Transmission C Coil - Open Circuit
- 33243UGM Output Drivers - Transmission B Coil - Open Circuit
- 33246UGM Output Drivers - Transmission Reverse Coil - Open Circuit
- 33249UGM Output Drivers - Transmission A Coil - Open Circuit
- 33252UGM Output Drivers - Transmission Forward Coil - Open Circuit
- 33255UGM Output Drivers - Transmission E Coil - Open Circuit
- 33258UGM Output Drivers - Transmission 1 Coil - Open Circuit
- 33261UGM Output Drivers - Transmission D Coil - Open Circuit
- 33264UGM Output Drivers - Transmission 2 Coil - Open Circuit
- 33370UGM Output Drivers - Boom Float Valve - Short to Battery or Open Circuit
- 33371UGM Output Drivers - Boom Tank Valve - Short to Battery or Open Circuit
- 4316Engine - High Engine Coolant Temperature Warning
- 4317Engine - High Engine Coolant Temperature Critical
- 437Engine - Engine Trouble Code:(SPN):(FMI)
- 441Battery Supply - Battery Voltage Too Low - System Shutdown
- 462Transmission & Drive System - Conflicting Drive Direction Signals
- 6621Communications - CAN Bus Failure - Boom Angle Sensor
- 6638Communications - CAN Bus Failure - LSI
- 814Tilt Sensor - Chassis Tilt Sensor Out of Range
- 815Tilt Sensor - Chassis Tilt Sensor Disagreement
- 829Platform Load Sense - Platform Functions Cutout - Platform Overloaded
- 8514Load Moment - LSI Not Calibrated
- 8516Load Moment - LSI Load Cell A - Out of Range
- 8517Load Moment - LSI Load Cell B - Out of Range
- 8518Load Moment - LSI Cutout Output - Short to Battery or Open Circuit
- 8519Load Moment - LSI Out of Calibration
- 9911Hardware - Function Locked Out - LSS Module Software Version Improper
- 99152Hardware - LSI Faulty - System Flash CRC Error
- 99153Hardware - LSI Faulty - Data Flash CRC Error
- 99154Hardware - LSI Faulty - Load Cells A and B Disagreement
- 9977Hardware - LSS Corrupt EEPROM
Safety-critical: confirm before use
Torque, lifting, and load-chart values are safety-critical. Never operate from these figures alone. Confirm against the official manual and a qualified technician.