All Aerial Lifts & Telehandlers (JLG / Genie / Skyjack / Manitou) Fault Codes
96 Aerial Lifts & Telehandlers (JLG / Genie / Skyjack / Manitou) diesel fault codes. Click any code for causes, diagnostics, severity, and common fixes.
GENIE-32-01 critical
Engine Coolant Temperature High Warning
GENIE-33-01 critical
Engine Oil Pressure Below Safe Operating Threshold
GENIE-TH-32-01 critical
Engine Coolant Temperature High Warning
GENIE-TH-33-01 critical
Engine Oil Pressure Below Safe Operating Threshold
JLG-100-4 critical
Engine Oil Pressure Below Safe Threshold, Shutdown Triggered
JLG-4351-15 critical
Engine Coolant Temperature Above ECM Warning Threshold
JLG-TH-100-4 critical
Engine Oil Pressure Below Safe Threshold, ECM Shutdown
JLG-TH-110-0 critical
Engine Coolant Temperature High Shutdown
JLG-TH-190-0 critical
Engine Overspeed Shutdown, ECM Cut Fuel
JLG-TH-5246-15 critical
EPA Aftertreatment Inducement Severe Derate Active
MANITOU-100-1 critical
Engine Oil Pressure Below Safe Operating Threshold
MANITOU-110-0 critical
Engine Coolant Temperature High Shutdown
MANITOU-190-0 critical
Engine Overspeed Shutdown RPM Limit Exceeded
GENIE-03-01 serious
Chassis Tilt Beyond Safe Operating Angle
GENIE-04-01 serious
Pothole Guard Failure to Deploy on Elevation
GENIE-07-01 serious
Engine ECM CAN Communication Lost
GENIE-12-01 serious
Lift Up Cutout Active on Reach Boom
GENIE-14-01 serious
Platform Overload Load Cell Above Rated Capacity
GENIE-21-01 serious
Steer Angle Sensor Signal Missing or Out of Range
GENIE-99-01 serious
Boom Rest Proximity Switch Inconsistent State
GENIE-99-99 serious
Controller Calibration Data Lost or Invalid
GENIE-TH-03-01 serious
Frame Tilt Sensor Reads Beyond Safe Operating Angle
GENIE-TH-07-01 serious
TCON Lost CAN Communication With Engine ECM
GENIE-TH-12-01 serious
Boom Lift-Up Disabled, Load Chart Envelope Exceeded
GENIE-TH-14-01 serious
Load Moment Indicator Near Tip-Over Envelope
GENIE-TH-21-01 serious
Steer Angle Sensor Signal Missing or Out of Range
GENIE-TH-99-99 serious
TCON Calibration Data Lost or Invalid
GENIE-TH-BOOM-ANGLE-FAULT serious
Boom Angle Sensor Signal Out of Range
GENIE-TH-BOOM-EXT-LIMIT serious
Boom Extension Sensor Signal Out of Range
GENIE-TH-JOYSTICK-CALIBRATION serious
Joystick Calibration Data Lost or Invalid
GENIE-TH-OUTRIGGER-NOT-DEPLOYED serious
Outrigger Limit Switch Not Sensing Deployed Position
JLG-252-12 serious
ECM and ADE Configuration Data Mismatch Detected
JLG-4291-15 serious
Hydraulic Oil Temperature Above Upper Limit
JLG-6017-14 serious
Drive Cutout Active Above Elevation Threshold
JLG-6018-12 serious
Steer Angle Sensor Signal Out of Range
JLG-6019-12 serious
Drive Joystick Calibration Data Lost or Invalid
JLG-6028-12 serious
Chassis Tilt Sensor Angle Outside Safe Envelope
JLG-6029-15 serious
LSS Platform Overload Detected, All Functions Cut
JLG-6056-14 serious
Pothole Guard Deployment Failure Detected
JLG-6058-14 serious
Lift Up Disabled, Platform Load Exceeds Capacity Envelope
JLG-9999-14 serious
Multiple Active Fault Codes Detected by ADE
JLG-TH-3251-15 serious
DPF Differential Pressure High, Regen Required
JLG-TH-6017-14 serious
Drive Cutout Active, Boom Elevated Beyond Safe Limit
JLG-TH-6019-12 serious
Joystick Calibration Data Invalid or Missing
JLG-TH-6029-15 serious
Load Capacity Envelope Exceeded, Boom Cutout Active
JLG-TH-BOOM-ANGLE-FAULT serious
Boom Angle Sensor Signal Out of Range
JLG-TH-BOOM-EXTENSION-FAULT serious
Boom Extension Cable Sensor Signal Out of Range
JLG-TH-FRAME-LEVEL-FAULT serious
Frame Tilt Sensor Signal Out of Range
JLG-TH-OUTRIGGER-NOT-DEPLOYED serious
Outrigger Limit Switch Not Confirming Deployed State
MANITOU-3251-15 serious
DPF Differential Pressure High, Regen Required
MANITOU-639-14 serious
J1939 CAN Network Controller Dropout Detected
MANITOU-BOOM-ANGLE-SENSOR serious
Boom Angle Sensor Signal Out of Range
MANITOU-BOOM-EXT-LIMIT serious
Boom Extension Sensor Out of Expected Range
MANITOU-EE serious
Emergency Stop Circuit Open or E-Stop Activated
MANITOU-FRAME-LEVEL-FAULT serious
Frame Tilt Sensor Signal Out of Range
MANITOU-HYD-OIL-TEMP-HIGH serious
Hydraulic Oil Temperature Above Safe Operating Limit
MANITOU-JOYSTICK-CALIBRATION serious
Joystick Calibration Data Invalid or Missing
MANITOU-LSI-ACTIVE serious
Load Stability Indicator Approaching Tip-Over Envelope
MANITOU-OUTRIGGER-NOT-DEPLOYED serious
Outrigger Position Not Confirmed, Boom Inhibited
MANITOU-PARK-BRAKE-FAULT serious
Park Brake Pressure Switch Not Releasing
SKYJACK-12 serious
Chassis Tilt Sensor Out of Safe Range
SKYJACK-13 serious
Pothole Guard Fault, Deploy Failure Detected
SKYJACK-31 serious
Drive Cutout Active, Platform Motion Blocked
SKYJACK-32 serious
Lift Function Cutout Active
SKYJACK-51 serious
Platform Overload Rated Capacity Exceeded
SKYJACK-71 serious
ECM Communication Lost on CAN Network
SKYJACK-81 serious
Hydraulic System Pressure Out of Range
SKYJACK-99 serious
Controller Calibration Data Invalid or Missing
GENIE-02-01 moderate
Battery Voltage Below Operating Threshold
GENIE-02-02 moderate
Battery Voltage Exceeded Upper Limit
GENIE-05-01 moderate
Drive Tilt Cutout Active While Elevated
GENIE-06-01 moderate
Joystick Not in Neutral at Power-Up
GENIE-15-01 moderate
Hydraulic Return Filter Restriction Detected
GENIE-TH-02-01 moderate
Battery Voltage Below Operating Threshold
GENIE-TH-02-02 moderate
Battery Voltage Above Acceptable Upper Limit
GENIE-TH-DEF-LEVEL-LOW moderate
DEF Tank Level Below Warning Threshold
GENIE-TH-DPF-REGEN-NEEDED moderate
DPF Soot Load Exceeds Auto-Regen Threshold
JLG-437-12 moderate
ADE Controller Battery Voltage Below Minimum Threshold
JLG-438-15 moderate
Battery Voltage Above Upper Limit Detected
JLG-6053-12 moderate
Function Cutout Active, Boom Above Horizontal
JLG-6088-14 moderate
Joystick Not in Neutral at Power-Up
JLG-TH-168-4 moderate
Battery Voltage Below Minimum Operating Threshold
JLG-TH-1761-1 moderate
DEF Tank Level Below Warning Threshold
JLG-TH-6053-12 moderate
Function Cutout Active -- Boom Above Horizontal
JLG-TH-6088-14 moderate
Joystick Not in Neutral at Key-On
MANITOU-168-4 moderate
Battery Voltage Below Cranking Threshold Detected
MANITOU-1761-1 moderate
DEF Tank Level Low Warning Active
SKYJACK-11 moderate
Drive Proportional Sensor Requires Calibration
SKYJACK-14 moderate
Down Limit Switch Not Detecting Stowed Position
SKYJACK-15 moderate
Up Limit Switch Fault Detected
SKYJACK-21 moderate
Battery Voltage Below Operating Threshold
SKYJACK-22 moderate
Battery Voltage Above Upper Operating Limit
SKYJACK-24 moderate
Onboard Charger Fault Detected During Charge Cycle
SKYJACK-41 moderate
Joystick Not at Neutral on Power-Up
GENIE-01-01 minor
Function Test Mode Active on GCON Controller
SKYJACK-61 minor
Function Test Mode Active on Platform Controller