CAT Fault Codes List: CID 329 to CID 338

Page 64 of 83 of the full CAT fault code list (8,286 codes). Each entry is the code as the machine reports it and what the manufacturer data says it means.

CAT codes CID 329 to CID 338

CID 329Communication Fault
CID 3290Traction Motor Blower #1 Air Flow Sensor
CID 3291Traction Motor Blower #2 Air Flow Sensor
CID 3292Engine #3 Electronic Control Module
CID 3293Bridge Contactor
CID 3294Parallel Contactor #1
CID 3295Parallel Contactor #2
CID 3296Parallel Contactor #3
CID 3297Parallel Contactor #4
CID 3298Parallel Contactor #5
CID 3299Parallel Contactor #6
CID 330Propane Switch Input
CID 3300Air Compressor Inverter
CID 3301Traction Motor Blower Inverter
CID 3302Generator #1 Current Sensor #1
CID 3303Generator #1 Current Sensor #2
CID 3304Generator #2 Current Sensor #2
CID 3305Generator #2 Current Sensor #2
CID 3306Generator #3 Current Sensor #1
CID 3307Generator #3 Current Sensor #2
CID 3308Electric Retarding Grid Blower #1
CID 3309Electric Retarding Grid Blower #2
CID 331Ignition Shutdown Switch
CID 3310Electric Retarding Grid #3 Current Sensor
CID 3311Electric Retarding Grid Fan Power Converter
CID 3312Alternator Excitation Field Regulator Enable Feedback Line
CID 3313Short Range Object Detection Sensor #1
CID 3314Short Range Object Detection Sensor #2
CID 3315Short Range Object Detection Sensor #3
CID 3316Short Range Object Detection Sensor #4
CID 3317Medium Object Detection Sensor #1
CID 3318Medium Object Detection Sensor #2
CID 3319Medium Object Detection Sensor #3
CID 332Keypad Switch
CID 3320Medium Object Detection Sensor #4
CID 3321Medium Object Detection Sensor #5
CID 3322Medium Object Detection Sensor #6
CID 3323Medium Object Detection Sensor #7
CID 3324Medium Object Detection Sensor #8
CID 3325Short Range Object Detection Sensor #1 Power Supply
CID 3326Short Range Object Detection Sensor #2 Power Supply
CID 3327Short Range Object Detection Sensor #3 Power Supply
CID 3328Short Range Object Detection Sensor #4 Power Supply
CID 3329Medium Range Object Detection Sensor #1 Power Supply
CID 333Annunciator Switch
CID 3330Medium Range Object Detection Sensor #2 Power Supply
CID 3331Medium Range Object Detection Sensor #3 Power Supply
CID 3332Medium Range Object Detection Sensor #4 Power Supply
CID 3333Medium Range Object Detection Sensor #5 Power Supply
CID 3334Medium Range Object Detection Sensor #6 Power Supply
CID 3335Medium Range Object Detection Sensor #7 Power Supply
CID 3336Medium Range Object Detection Sensor #8 Power Supply
CID 3337Traction Control Module
CID 3338Cooling Fan #1 High Speed Relay
CID 3339Cooling Fan #1 Low Speed Relay
CID 334Spare Output
CID 3340Cooling Fan #2 High Speed Relay
CID 3341Cooling Fan #2 Low Speed Relay
CID 3342Cooling Fan #3 High Speed Relay
CID 3343Cooling Fan #3 Low Speed Relay
CID 3344Traction Motor #1 To Traction Motor #4 Series Contactor
CID 3345Traction Motor #2 To Traction Motor #5 Series Contactor
CID 3346Traction Motor #3 To Traction Motor #6 Series Contactor
CID 3347Ground Fault Relay
CID 3348Main Air Supply Relay
CID 3349Main Air Reservoir Pressure Sensor
CID 335Scraper Bowl Auger Solenoid
CID 3350Traction Motor #1 Current Sensor
CID 3351Traction Motor #2 Current Sensor
CID 3352Traction Motor #3 Current Sensor
CID 3353Traction Motor #4 Current Sensor
CID 3354Traction Motor #5 Current Sensor
CID 3355Traction Motor #6 Current Sensor
CID 3356Traction Motor #1 Voltage Sensor
CID 3357Traction Motor #2 Voltage Sensor
CID 3358Traction Motor #3 Voltage Sensor
CID 3359Traction Motor #4 Voltage Sensor
CID 336Engine Control Switch
CID 3360Traction Motor #5 Voltage Sensor
CID 3361Traction Motor #6 Voltage Sensor
CID 3362Reverser Lever
CID 3363Companion Alternator #1
CID 3364Companion Alternator #2
CID 3365Companion Alternator #3
CID 3366Companion Alternator #1 Rectifier
CID 3367Companion Alternator #2 Rectifier
CID 3368Companion Alternator #3 Rectifier
CID 3369Companion Alternator #1 Field Regulator
CID 337Remote Emergency Stop Switch
CID 3370Companion Alternator #2 Field Regulator
CID 3371Companion Alternator #3 Field Regulator
CID 3372Engine Charge Air Cooler #1 Outlet Temperature Sensor
CID 3373Engine Charge Air Cooler #2 Outlet Temperature Sensor
CID 3374Transmission Dropbox Lube Oil Diverter Valve Solenoid
CID 3375Direction Selector #1 Position Sensor #1
CID 3376Direction Selector #1 Position Sensor #2
CID 3377Direction Selector #2 Position Sensor #1
CID 3378Direction Selector #2 Position Sensor #2
CID 3379Remote Operator Station Module
CID 338Engine Pre-lube Pump Relay

Looking for a different CAT code?Search the full fault-code database, or hand the code to the AI assistant for a plain-English explanation.

Other Caterpillar machine types

Fault code lists by brand

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.