Diagnostics
JLG Articulating Boom Lift Fault Codes: Meanings, Causes & Fixes
In-depth, plain-English guides to JLG Articulating Boom Lift 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.
- 00Everything Ok
- 1Speed Sensor 1
- 10Charge Air Temperature
- 11Sleep Mode
- 12Throttle Position (TP) Sensor Low Voltage
- 13Overspeed
- 14Manifold Absolute Pressure (MAP) Low Voltage
- 21Problems with Foot Switch
- 22Problems with Drive & Steer Selection
- 2212Drive Locked - Joystick Moved Before Foot Switch
- 2221Lift/Swing Locked - Joystick Moved Before Foot Switch
- 23Problems with Boom Function Selection
- 234Function Switches Faulty-Check Diagnostics/Boom
- 25A Function is Prevented Due to a Cutout
- 31Contactor Did Not Close When Energized
- 32Contactor Did Not Open When Energized
- 33Driver Problem
- 336Crank Sync Noise
- 34Driver Problem on a Platform Valve Block Valve Driver
- 35Brake Pressure Problem
- 353Megajector Delivery Pressure Higher Than Expected
- 354Megajector Delivery Pressure Lower Than Expected
- 43Problems with the Engine
- 431Fuel Sensor Short to Battery
- 44Problems with the Battery Supply
- 45Intake Air Temperature (lAT) Sensor Low Voltage
- 52Reference Feedback
- 53Control Travel Difference
- 55Problems with Vehicle Engine RPM or the Encoder
- 59Auto Calibration Bosch-EDC Pumps Faulty Operation
- 66Problems with the CAN Bus
- 662CAN Bus Failure - Platform Module
- 666CAN Bus Failure-Engine Controller
- 77Problems with a Motor
- 81Problems with the Chassis Tilt Detection System
- 815Chassis Tilt Sensor Disagreement
- 83Reference Voltage 1
- 84Reference Voltage 2
- 85Reference Voltage 4
- 86Internal Temperature
- 87Atmospheric Pressure
- 9Coolant Temperature
- 99Problems with the Controller
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.