Diagnostics
JLG Scissor Lift Fault Codes List & Code Lookup
Look up 54 JLG Scissor Lift fault codes and error codes, in plain English. 54 of them have a full guide covering what the code means, what triggers it, the most common causes, and the first things to check before you call the dealer.
- 1Speed Sensor 1
- 11Charge Air Temperature
- 21Key Switch Faulty - Platform & Ground Active Together
- 22Joystick Calibration Faulty
- 221TPS 2 Signal Voltage Low
- 223TPS 2 Signal High Voltage
- 23Level Sensor Failure
- 2315Ground Controls - Operating Mode Interlock - Stabilizers Not Deployed
- 2317Ground Controls - Operating Mode Interlock - Chassis Not Level
- 2346Ground Controls - Boom Angle Sensor - Not Responding
- 2347Ground Controls - System Interlock - Set Joystick Inputs to Neutral
- 2353Ground Controls - Boom Angle Sensor - Internal Failure
- 25Elev Angle Sensor Has Not Been Calibrated
- 251Elev Angle Sensor Faulty - Voltage Out of Range
- 257Elev Prox Permanently Closed - Check Prox and Angle Adjustment
- 26Rear Deck Extend Valve Open Circuit
- 3Speed Sensor
- 31Coolant Temperature Warning
- 311Open Circuit Line Contactor
- 32Charge Air Temperature Warning
- 321Line Contactor Miswired On or Welded
- 33Contactor Coil is Short-Circuit
- 336Crank Sync Noise
- 337Crank Loss
- 4Excess Speed Switch Off
- 437Engine - Engine Trouble Code:(SPN):(FMI)
- 44Battery Low
- 5Drive & Lift Up Prevented - Tilted & Elevated
- 55Speed Input Lost
- 59Auto Calibration Bosch-EDC Pumps Faulty Operation
- 6Lift Up Prevented - Max Height Zone A
- 66CAN Bus Failure
- 661CAN Bus Failure - Power Module
- 662CAN Bus Failure - Platform Module
- 663CAN Bus Failure - Load Sensing System Module
- 67Error Hand Setp1
- 7Charge Air Pressure
- 77Cyclic Program Test
- 8Oil Pressure
- 81LSS Cell #1 Error
- 82LSS Cell #2 Error
- 821LSS Cell #1 Error
- 822LSS Cell #2 Error
- 823LSS Cell #3 Error
- 824LSS Cell #4 Error
- 825LSS Has Not Been Calibrated
- 829Platform Load Sense - Platform Functions Cutout - Platform Overloaded
- 83LSS Cell #3 Error
- 84LSS Cell #4 Error
- 9Coolant Temperature
- 91Fuel Pump Low Voltage
- 92Fuel Pump High Voltage
- 93Stack Overflow
- 99LSS Needs to be Re-Calibrated
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Safety-critical: confirm before use
Safety first: park on level ground, stop the engine, and secure the machine before any inspection. Thresholds, component locations, wire numbers, fuse locations, and reset procedures can vary by model, configuration, and serial number. Confirm them in the service documentation for your exact machine.