Diagnostics
JLG Telehandler Fault Codes List & Code Lookup
Look up 1,016 JLG Telehandler fault codes and error codes, in plain English. 64 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.
JLG Telehandler fault code guides
- 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
Full JLG Telehandler fault code list
A generic J1939 reader pulls 702 of these; the other 314 need JLG Telehandler tooling to read in full. Every listed code is below, in code order, 100 to a page.
Codes on file
1,016
Readable as J1939 SPN/FMI
702
JLG Telehandler-specific
314
- 1Air Flow Sensor Load Correction Factor Exceeding the Maximum Drift Limit; Plausibility Error
- 1007Sensor Error EGR Cooler Downstream Temperature; Signal Range Check High
- 1008Sensor Error EGR Cooler Downstream Temperature; Signal Range Check Low
- 1009Sensor Exhaust Gas Temperature Venturi Unit (EGR); Plausibility Error
- 101Coolant Level Too Low
- 1011Physical Range Check High for EGR Cooler Downstream Temperature
- 1012Physical Range Check Low for EGR Cooler Downstream Temperature
- 1013Sensor Exhaust Gas Temperature Venturi Unit (EGR); Plausibility Error
- 1014Actuator Error EGR-Valve (2.9;3.6) or Throttle-Valve (6.1,7.8); Signal Range Check High
- 1015Actuator Error EGR-Valve (2.9;3.6) or Throttle-Valve (6.1,7.8); Signal Range Check Low
- 1016Actuator Position for EGR-Valve (2.9;3.6) or Throttle-Valve (6.1,7.8); Not Plausible
- 1017Actuator EGR-Valve (2.9;3.6) or Throttle-Valve (6.1,7.8); Open Load
- 1018Actuator EGR-Valve (2.9;3.6) or Throttle-Valve (6.1,7.8); Power Stage Over Temperature
- 1019EGR-Valve (2.9;3.6) or Throttle-Valve (6.1,7.8); Short Circuit to Battery
- 1020EGR-Valve (2.9;3.6) or Throttle-Valve (6.1,7.8); Short Circuit to Ground
- 1021Mechanical Actuator Defect EGR-Valve (2.9,3.6) or Throttle-Valve (6.1,7.8)
- 1022Actuator Error EGR-Valve (2.9;3.6) or Throttle-Valve (6.1,7.8); Signal Range Check High
- 1023Actuator Error EGR-Valve (2.9;3.6) or Throttle-Valve (6.1,7.8); Signal Range Check Low
- 1024Position Sensor Error of Actuator EGR-Valve (2.9;3.6) or Throttle-Valve (6.1,7.8); Signal Range Check High
- 1025Position Sensor Error of Actuator EGR-Valve (2.9;3.6) or Throttle-Valve (6.1,7.8); Signal Range Check Low
- 1026Sensor Exhaust Gas Temperature Downstream (DOC); Plausibility Error
- 1029Physical Range Check High for Exhaust Gas Temperature Downstream (DOC)
- 1032Physical Range Check Low for Exhaust Gas Temperature Downstream (DOC)
- 1034Sensor Error Exhaust Gas Temperature Downstream (DOC); Signal Range Check High
- 1035Sensor Error Exhaust Gas Temperature Downstream (DOC); Signal Range Check Low
- 1036Sensor Exhaust Gas Temperature Upstream (DOC); Plausibility Error
- 1039Physical Range Check High for Exhaust Gas Temperature Upstream (DOC)
- 1042Physical Range Check Low for Exhaust Gas Temperature Upstream (DOC)
- 1044Sensor Error Exhaust Gas Temperature Upstream (DOC); Signal Range Check High
- 1045Sensor Error Exhaust Gas Temperature Upstream (DOC); Signal Range Check Low
- 1047Sensor Error Particle Filter Downstream Temperature; Signal Range Check Low
- 1066Sensor Exhaust Gas Temperature Upstream Turbine; Plausibility Error
- 1067Sensor Error Exhaust Gas Temperature Upstream Turbine; Signal Range Check High
- 1068Sensor Error Exhaust Gas Temperature Upstream Turbine; Signal Range Check Low
- 1069Physical Range Check High for Urea Catalyst Upstream Temperature
- 1070Physical Range Low for Urea Catalyst Upstream Temperature
- 1072Sensor Error Urea Catalyst Exhaust Gas Temperature Upstream; Signal Range Check High
- 1073Sensor Error Urea Catalyst Exhaust Gas Temperature Upstream; Signal Range Check Low
- 1074Urea Tank Level; Warning Threshold Exceeded
- 1077Urea Dosing Valve; Short Circuit to Battery on High Side
- 1078Urea Dosing Valve; Short Circuit to Battery or Open Load on High Side
- 1079Urea Dosing Valve; Short Circuit to Ground or Open Load on Low Side
- 1080Urea Dosing Valve; Short Circuit on High Side
- 1081SCR Heater Relay Urea Return Line Secondary Side; Open Load
- 1082SCR Main Relay (Secondary Side); Open Load
- 1083SCR Heater Relay Urea Pressure Line Secondary Side; Open Load
- 1084SCR Main Relay (Secondary Side); Shortcut to Battery
- 1085SCR Main Relay (Secondary Side); Shortcut to Ground
- 1086SCR Heater Relay Urea Supply Line Secondary Side; Open Load
- 1087SCR Heater Relay Urea Supply Module Secondary Side; Open Load
- 1088SCR Tank Heating Valve Secondary Side; Open Load
- 1089SCR System Heater Diagnostic Reports Error; Shut Off SCR-System
- 109Fuel Balance Control Integrator Injector 1 (In Firing Order); Maximum Value Exceeded
- 1090SCR Heater Relay Urea Return Line Primary Side; Open Load
- 1092SCR Heater Urea Return Line; Short Circuit to Battery
- 1093SCR Heater Urea Return Line; Short Circuit to Ground
- 1094SCR Heater Relay Urea Pressure Line Primary Side; Open Load
- 1096SCR Heater Urea Pressure Line; Short Circuit to Battery
- 1097SCR Heater Urea Pressure Line; Short Circuit to Ground
- 1098SCR Main Relay (Primary Side); Open Load
- 1099SCR Main Relay (Primary Side); Power Stage Over Temperature
- 110Fuel Balance Control Integrator Injector 2 (In Firing Order); Maximum Value Exceeded
- 1100SCR Main Relay (Primary Side); Short Circuit to Battery
- 1101SCR Main Relay (Primary Side); Short Circuit to Ground
- 1102SCR Heater Relay Urea Supply Line Primary Side; Open Load
- 1104SCR-Heater Urea Supply Line; Short Circuit to Battery
- 1105SCR-Heater Urea Supply Line; Short Circuit to Ground
- 1106SCR Heater Relay Urea Supply Module Primary Side; Open Load
- 1108SCR Heater Urea Supply Module; Short Circuit to Battery
- 1109SCR Heater Urea Supply Module; Short Circuit to Ground
- 111Fuel Balance Control Integrator Injector 3 (In Firing Order); Maximum Value Exceeded
- 1110SCR Tank Heating Valve Primary Side; Open Load
- 1111SCR-Heater Relay Urea Tank Power Stage Output; Over Temperature
- 1112SCR Tank Heating Valve; Short Circuit to Battery
- 1113SCR Tank Heating Valve; Short Circuit to Ground
- 1118Urea Pump Motor; Open Load
- 112Fuel Balance Control Integrator Injector 4 (In Firing Order); Maximum Value Exceeded
- 1120Urea Pump Motor; Short Circuit to Battery
- 1121Urea Pump Motor; Short Circuit to Ground
- 1122Physical Range Check High for Urea Pump Pressure
- 1123Physical Range Check Low for Urea Pump Pressure
- 1124Urea Pump Pressure Sensor; High Signal Not Plausible
- 1125Urea Pump Pressure Sensor; Low Signal Not Plausible
- 1127Sensor Error Urea Pump Pressure; Signal Range Check High
- 1128Sensor Error Urea Pump Pressure; Signal Range Check Low
- 1129SCR Reversing Valve; Open Load
- 113Fuel Balance Control Integrator Injector 5 (In Firing Order); Maximum Value Exceeded
- 1130SCR Reversing Valve; Over Temperature
- 1131SCR Reversing Valve; Short Circuit to Battery
- 1132SCR Reversing Valve; Short Circuit to Ground
- 1135Diesel Exhaust Fluid -Tank Temperature; Maximum Exceeded
- 1136DEF-Tank Temperature; Below Minimum
- 1138Sensor Error Urea Tank Temperature; Short Circuit to Battery
- 1139Sensor Error Urea Tank Temperature; Short Circuit to Ground
- 114Fuel Balance Control Integrator Injector 6 (In Firing Order); Maximum Value Exceeded
- 115Fuel Balance Control Integrator Injector 1 (In Firing Order); Minimum Value Exceeded
- 1157Water in Fuel Level Prefilter; Maximum Value Exceeded
- 1158Zero Fuel Calibration Injector 1 (In Firing Order); Maximum Value Exceeded
- 1159Zero Fuel Calibration Injector 2 (In Firing Order); Maximum Value Exceeded
- 116Fuel Balance Control Integrator Injector 2 (In Firing Order); Minimum Value Exceeded
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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.