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Network/Communication Diagnostic Trouble Codes

This directory contains generic diagnostic trouble codes starting with U. These codes indicate faults detected within the vehicle's network/communication components.

Diagnostic Code Index (1,081 codes)

List of Network/Communication Diagnostic Codes
DTCDescription
U0001High Speed CAN Communication Bus
U0002High Speed CAN Communication Bus Performance
U0003High Speed CAN Communication Bus (+) Open
U0004High Speed CAN Communication Bus (+) Low
U0005High Speed CAN Communication Bus (+) High
U0006High Speed CAN Communication Bus (-) Open
U0007High Speed CAN Communication Bus (-) Low
U0008High Speed CAN Communication Bus (-) High
U0009High Speed CAN Communication Bus (-) shorted to Bus (+)
U0010Medium Speed CAN Communication Bus
U0011Medium Speed CAN Communication Bus Performance
U0012Medium Speed CAN Communication Bus (+) Open
U0013Medium Speed CAN Communication Bus (+) Low
U0014Medium Speed CAN Communication Bus (+) High
U0015Medium Speed CAN Communication Bus (-) Open
U0016Medium Speed CAN Communication Bus (-) Low
U0017Medium Speed CAN Communication Bus (-) High
U0018Medium Speed CAN Communication Bus (-) shorted to Bus (+)
U0019Low Speed CAN Communication Bus
U0020Low Speed CAN Communication Bus Performance
U0021Low Speed CAN Communication Bus (+) Open
U0022Low Speed CAN Communication Bus (+) Low
U0023Low Speed CAN Communication Bus (+) High
U0024Low Speed CAN Communication Bus (-) Open
U0025Low Speed CAN Communication Bus (-) Low
U0026Low Speed CAN Communication Bus (-) High
U0027Low Speed CAN Communication Bus (-) shorted to Bus (+)
U0028Vehicle Communication Bus A
U0029Vehicle Communication Bus A Performance
U0030Vehicle Communication Bus A (+) Open
U0031Vehicle Communication Bus A (+) Low
U0032Vehicle Communication Bus A (+) High
U0033Vehicle Communication Bus A (-) Open
U0034Vehicle Communication Bus A (-) Low
U0035Vehicle Communication Bus A (-) High
U0036Vehicle Communication Bus A (-) shorted to Bus A (+)
U0037Vehicle Communication Bus B
U0038Vehicle Communication Bus B Performance
U0039Vehicle Communication Bus B (+) Open
U0040Vehicle Communication Bus B (+) Low
U0041Vehicle Communication Bus B (+) High
U0042Vehicle Communication Bus B (-) Open
U0043Vehicle Communication Bus B (-) Low
U0044Vehicle Communication Bus B (-) High
U0045Vehicle Communication Bus B (-) shorted to Bus B (+)
U0046Vehicle Communication Bus C
U0047Vehicle Communication Bus C Performance
U0048Vehicle Communication Bus C (+) Open
U0049Vehicle Communication Bus C (+) Low
U0050Vehicle Communication Bus C (+) High
U0051Vehicle Communication Bus C (-) Open
U0052Vehicle Communication Bus C (-) Low
U0053Vehicle Communication Bus C (-) High
U0054Vehicle Communication Bus C (-) shorted to Bus C (+)
U0055Vehicle Communication Bus D
U0056Vehicle Communication Bus D Performance
U0057Vehicle Communication Bus D (+) Open
U0058Vehicle Communication Bus D (+) Low
U0059Vehicle Communication Bus D (+) High
U0060Vehicle Communication Bus D (-) Open
U0061Vehicle Communication Bus D (-) Low
U0062Vehicle Communication Bus D (-) High
U0063Vehicle Communication Bus D (-) shorted to Bus D (+)
U0064Vehicle Communication Bus E
U0065Vehicle Communication Bus E Performance
U0066Vehicle Communication Bus E (+) Open
U0067Vehicle Communication Bus E (+) Low
U0068Vehicle Communication Bus E (+) High
U0069Vehicle Communication Bus E (-) Open
U0070Vehicle Communication Bus E (-) Low
U0071Vehicle Communication Bus E (-) High
U0072Vehicle Communication Bus E (-) shorted to Bus E (+)
U0073Control Module Communication Bus A Off
U0074Control Module Communication Bus B Off
U0075Control Module Communication Bus C Off
U0076Control Module Communication Bus D Off
U0077Control Module Communication Bus E Off
U0078Control Module Communication Bus F Off
U0079Control Module Communication Bus G Off
U007AControl Module Communication Bus H Off
U007BControl Module Communication Bus I Off
U007CControl Module Communication Bus J Off
U007DControl Module Communication Bus K Off
U007EControl Module Communication Bus L Off
U007FControl Module Communication Bus M Off
U0080Vehicle Communication Bus F
U0081Vehicle Communication Bus F Performance
U0082Vehicle Communication Bus F + Open
U0083Vehicle Communication Bus F + Low
U0084Vehicle Communication Bus F + High
U0085Vehicle Communication Bus F - Open
U0086Vehicle Communication Bus F - Low
U0087Vehicle Communication Bus F - High
U0088Vehicle Communication Bus F - Shorted to Bus F +
U0089Vehicle Communication Bus G
U008AVehicle Communication Bus G Performance
U008BVehicle Communication Bus G (+) Open
U008CVehicle Communication Bus G (+) Low
U008DVehicle Communication Bus G (+) High
U008EVehicle Communication Bus G (-) Open
U008FVehicle Communication Bus G (-) Low
U0090Vehicle Communication Bus G (-) High
U0091Vehicle Communication Bus G (-) shorted to Bus G (+)
U0092Vehicle Communication Bus H
U0093Vehicle Communication Bus H Performance
U0094Vehicle Communication Bus H (+) Open
U0095Vehicle Communication Bus H (+) Low
U0096Vehicle Communication Bus H (+) High
U0097Vehicle Communication Bus H (-) Open
U0098Vehicle Communication Bus H (-) Low
U0099Vehicle Communication Bus H (-) High
U009AVehicle Communication Bus H (-) shorted to Bus H (+)
U009BVehicle Communication Bus I
U009CVehicle Communication Bus I Performance
U009DVehicle Communication Bus J
U009EVehicle Communication Bus J Performance
U0100Lost Communication With ECM/PCM A
U0101Lost Communication With TCM
U0102Lost Communication With Transfer Case Control Module
U0103Lost Communication With Gear Shift Control Module A
U0104Lost Communication With Cruise Control Module
U0105Lost Communication With Fuel Injector Control Module
U0106Lost Communication With Glow Plug Control Module 1
U0107Lost Communication With Throttle Actuator A Control Module
U0108Lost Communication With Alternative Fuel Control Module
U0109Lost Communication With Fuel Pump Control Module A
U010ALost Communication With Exhaust Gas Recirculation Control Module A
U010BLost Communication With Exhaust Gas Recirculation Control Module B
U010CLost Communication With Turbocharger/Supercharger Control Module A
U010DLost Communication With Turbocharger/Supercharger Control Module B
U010ELost Communication With Reductant Control Module
U010FLost Communication With Air Conditioning Control Module
U0110Lost Communication With Drive Motor Control Module A
U0111Lost Communication With Battery Energy Control Module A
U0112Lost Communication With Battery Energy Control Module B
U0113Lost Communication With Emissions Critical Control Information
U0114Lost Communication With Four-Wheel Drive Clutch Control Module
U0115Lost Communication With ECM/PCM B
U0116Lost Communication With Coolant Temperature Control Module
U0117Lost Communication With PTO Control Module
U0118Lost Communication With Fuel Additive Control Module
U0119Lost Communication With Fuel Cell Control Module
U011ALost Communication With Exhaust Gas Sensor Module A
U011BLost Communication With Rocker Arm Control Module A
U011CLost Communication With Rocker Arm Control Module B
U011DLost Communication With All Wheel Drive Control Module
U011ELost Communication With Throttle Actuator B Control Module
U011FLost Communication With V2X Module
U0120Lost Communication With Starter / Generator Control Module
U0121Lost Communication With Anti-Lock Brake System (ABS) Control Module A
U0122Lost Communication With Vehicle Dynamics Control Module
U0123Lost Communication With Yaw Rate Sensor Module
U0124Lost Communication With Lateral Acceleration Sensor Module
U0125Lost Communication With Multi-axis Acceleration Sensor Module A
U0126Lost Communication With Steering Angle Sensor Module
U0127Lost Communication With Tire Pressure Monitor Module
U0128Lost Communication With Park Brake Control Module
U0129Lost Communication With Brake System Control Module A
U012ALost Communication With Chassis Control Module A
U012BLost Communication With Chassis Control Module B
U012CLost Communication With Active Vibration Control Module
U012DLost Communication With Generator A Control Module
U012ELost Communication With Camshaft Position Control Module
U012FLost Communication With Generator B Control Module
U0130Lost Communication With Steering Effort Control Module
U0131Lost Communication With Power Steering Control Module A
U0132Lost Communication With Suspension Control Module A
U0133Lost Communication With Active Roll Control Module
U0134Lost Communication With Power Steering Control Module - Rear
U0135Lost Communication With Differential Control Module - Front
U0136Lost Communication With Differential Control Module - Rear
U0137Lost Communication With Trailer Brake Control Module
U0138Lost Communication With All Terrain Control Module
U0139Lost Communication With Suspension Control Module B
U013CLost Communication With Accelerator Pedal Module
U013DLost Communication With Vacuum Sensor A
U013ELost Communication With Vacuum Sensor B
U013FLost Communication With Pedestrian Alert Control Module
U0140Lost Communication With Body Control Module
U0141Lost Communication With Body Control Module A
U0142Lost Communication With Body Control Module B
U0143Lost Communication With Body Control Module C
U0144Lost Communication With Body Control Module D
U0145Lost Communication With Body Control Module E
U0146Lost Communication With Serial Data Gateway Module A
U0147Lost Communication With Serial Data Gateway Module B
U0148Lost Communication With Serial Data Gateway Module C
U0149Lost Communication With Serial Data Gateway Module D
U014ALost Communication With Battery Energy Control Module C
U014BLost Communication With Hybrid/EV Battery Inductive Charging Module
U014CLost Communication With Battery Energy Control Module D
U014DLost Communication with Mirror Control Module B
U014ELost Communication With Multi-axis Acceleration Sensor Module B
U0150Lost Communication With Serial Data Gateway Module E
U0151Lost Communication With Restraints Control Module
U0152Lost Communication With Side Restraints Control Module - Left
U0153Lost Communication With Side Restraints Control Module - Right
U0154Lost Communication With Restraints Occupant Classification System Module
U0155Lost Communication With Instrument Panel Cluster (IPC) Control Module
U0156Lost Communication With Information Center A
U0157Lost Communication With Information Center B
U0158Lost Communication With Head Up Display
U0159Lost Communication With Parking Assist Control Module A
U015ALost Communication With Anti-Lock Brake System (ABS) Control Module B
U015BLost Communication With Power Steering Control Module “B”
U015CLost Communication With Automated Driving System Control Module A
U015DLost Communication With Automated Driving System Control Module B
U015ELost Communication With Automated Driving System Interface Module “A”
U015FLost Communication With Automated Driving System Interface Module “B
U0160Lost Communication With Audible Alert Control Module
U0161Lost Communication With Compass Module
U0162Lost Communication With Navigation Display Module
U0163Lost Communication With Navigation Control Module
U0164Lost Communication With HVAC Control Module
U0165Lost Communication With HVAC Control Module - Rear
U0166Lost Communication With Auxiliary Heater Control Module
U0167Lost Communication With Vehicle Immobilizer Control Module
U0168Lost Communication With Vehicle Security Control Module
U0169Lost Communication With Sunroof Control Module
U016ALost Communication With Global Positioning System Module
U016BLost Communication With A/C Compressor Control Module
U016CLost Communication With Fuel Pump Control Module B
U016DLost Communication With Exhaust Gas Sensor Module B
U0170Lost Communication With Restraints System Sensor A
U0171Lost Communication With Restraints System Sensor B
U0172Lost Communication With Restraints System Sensor C
U0173Lost Communication With Restraints System Sensor D
U0174Lost Communication With Restraints System Sensor E
U0175Lost Communication With Restraints System Sensor F
U0176Lost Communication With Restraints System Sensor G
U0177Lost Communication With Restraints System Sensor H
U0178Lost Communication With Restraints System Sensor I
U0179Lost Communication With Restraints System Sensor J
U017ALost Communication With Restraints System Sensor K
U017BLost Communication With Restraints System Sensor L
U017CLost Communication With Restraints System Sensor M
U017DLost Communication With Restraints System Sensor N
U017ELost Communication With Seat Belt Pretensioner Module A
U017FLost Communication With Seat Belt Pretensioner Module B
U0180Lost Communication With Automatic Lighting Control Module
U0181Lost Communication With Headlamp Leveling Control Module A
U0182Lost Communication With Lighting Control Module - Front
U0183Lost Communication With Lighting Control Module - Rear A
U0184Lost Communication With Radio
U0185Lost Communication With Antenna Control Module
U0186Lost Communication With Audio Amplifier A
U0187Lost Communication With Digital Disc Player/Changer Module A
U0188Lost Communication With Digital Disc Player/Changer Module B
U0189Lost Communication With Digital Disc Player/Changer Module C
U018ALost Communication With Headlamp Leveling Control Module B
U0190Lost Communication With Digital Disc Player/Changer Module D
U0191Lost Communication With Television
U0192Lost Communication With Personal Computer
U0193Lost Communication With Digital Audio Control Module A
U0194Lost Communication With Digital Audio Control Module B
U0195Lost Communication With Subscription Entertainment Receiver Module
U0196Lost Communication With Entertainment Control Module - Rear A
U0197Lost Communication With Telephone Control Module
U0198Lost Communication With Telematic Control Module
U0199Lost Communication With Door Control Module A
U019ALost Communication With Tachograph Module
U019BLost Communication With Battery Charger Control Module A
U019CLost Communication With Glow Plug Control Module 2
U019DLost Communication With Direct Ozone Reduction Catalyst Temperature Sensor
U019ELost Communication With Transmission Range Control Module
U019FLost Communication With Engine Coolant Pump Control Module
U01A0Lost Communication With Hybrid/EV Battery Interface Control Module A
U01A1Lost Communication With Hybrid/EV Battery Interface Control Module B
U01A2Lost Communication With Hybrid/EV Battery Interface Control Module C
U01A3Lost Communication With Hybrid/EV Battery Interface Control Module D
U01A4Lost Communication With Hybrid/EV Battery Interface Control Module E
U01A5Lost Communication With Hybrid/EV Battery Interface Control Module F
U01A6Lost Communication With Hybrid/EV Battery Interface Control Module G
U01A7Lost Communication With Hybrid/EV Battery Interface Control Module H
U01A8Lost Communication With Hybrid/EV Battery Interface Control Module I
U01A9Lost Communication With Hybrid/EV Battery Interface Control Module J
U01AALost Communication With Hybrid/EV Battery Interface Control Module K
U01ABLost Communication With Hybrid/EV Battery Interface Control Module L
U01ACLost Communication With Hybrid/EV Battery Interface Control Module M
U01ADLost Communication With Hybrid/EV Battery Interface Control Module N
U01AELost Communication With Hybrid/EV Battery Interface Control Module O
U01AFLost Communication With Hybrid/EV Battery Interface Control Module P
U01B0Lost Communication With Battery Monitor Module
U01B1Lost Communication With Particulate Matter Sensor B
U01B2Lost Communication With Planetary Gear Set Control Module
U01B3Lost Communication With Brake Blending Actuator
U01B4Lost Communication With Brake System Control Module B
U01B5Lost Communication With Catalyst Heater Control Module
U01B6Lost Communication With Fuel Heater Control Module
U01B7Lost Communication With Switch Input Module “A”
U01B8Lost Communication With Switch Input Module “B”
U01B9Lost Communication With Switch Input Module “C”
U01BALost Communication With Park Lock/Pawl Control Module
U01BBLost Communication With Battery Charger Control Module B
U01BCLost Communication With Charge Air Cooler Coolant Pump B
U01BDLost Communication With DC/DC Converter Control Module C
U01BELost Communication with Drive Motor A Clutch Actuator
U01BFLost Communication with Battery Management Control Module
U0200Lost Communication With Door Control Module B
U0201Lost Communication With Door Control Module C
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