Network Communication Codes (U0XXX)
Complete list of network communication diagnostic trouble codes (U0XXX). Browse codes for CAN bus and module communication issues.
Popular Network Communication Codes
U0121
Lost Communication with ABS
Lost Communication with Anti-Lock Brake System Control Module
U0202
Lost Communication with Instrument Panel
Lost Communication with Instrument Panel Control Module
U0300
Lost Communication with Infotainment
Lost Communication with Infotainment Control Module
Complete Network Codes Index
Browse all available network communication diagnostic trouble codes (U0XXX) organized by series:
Showing codes 1001-1100 of 4097 total codes
U0XXX Network Communication Systems
U03E8
U03E8 indicates a communication issue between vehicle control modules.
U03E9
U03E9 indicates a communication failure between control modules in your vehicle.
U03EA
U03EA indicates a communication failure between control modules in your vehicle.
U03EB
U03EB indicates a communication error between vehicle control modules,
U03EC
U03EC indicates a communication error between control modules in your vehicle.
U03ED
The U03ED code indicates a communication failure between control modules in y...
U03EE
U03EE indicates a communication failure between vehicle control modules.
U03EF
The U03EF code indicates a lost communication with the vehicle control module.
U03F0
U03F0 means there's a communication issue with a control module in your vehicle.
U03F1
U03F1 indicates a communication failure between the vehicle's control modules.
U03F2
U03F2 indicates a problem with communication between control modules in your ...
U03F3
The U03F3 code indicates a communication failure between the vehicle's contro...
U03F4
U03F4 indicates a communication failure between vehicle control modules.
U03F5
The U03F5 code indicates a communication error between vehicle modules.
U03F6
U03F6 indicates a communication failure between vehicle control modules.
U03F7
The U03F7 code indicates a loss of communication with the hybrid control modu...
U03F8
DTC U03F8 indicates a communication failure between vehicle control modules.
U03F9
U03F9 indicates a communication error between control modules.
U03FA
U03FA indicates a communication failure between vehicle control modules.
U03FB
U03FB indicates a communication failure between the Body Control Module and o...
U03FC
U03FC indicates a communication issue between vehicle control modules.
U03FD
U03FD indicates a communication failure in vehicle control modules.
U03FE
DTC U03FE indicates a communication failure with a specific control module in...
U03FF
U03FF indicates a communication failure between vehicle control modules.
U0400
U0400 indicates a communication error between control modules in your vehicle.
U0401
The U0401 code indicates that the vehicle's control modules are not communica...
U0402
The U0402 code indicates that the ECM/PCM has received invalid data from anot...
U0403
DTC U0403 indicates that the Engine Control Module (ECM) has detected invalid...
U0404
U0404 means invalid data received from a control module, often affecting perf...
U0405
The U0405 code indicates invalid data received from a vehicle control module,...
U0406
U0406 indicates invalid data received from a vehicle control module.
U0407
The diagnostic trouble code (DTC) U0407 indicates that the vehicle’s control ...
U0408
U0408 indicates invalid data received from the vehicle control module.
U0409
DTC U0409 indicates invalid data received from a control module within the ve...
U040A
U040A indicates a communication error between the PCM and TCM.
U040B
U040B indicates an invalid data signal from the Transmission Control Module.
U040C
U040C refers to a communication error between the engine control module and a...
U040D
U040D means that there's a communication error with the vehicle's control mod...
U040E
U040E indicates invalid data received from the ECM or PCM.
U040F
U040F indicates invalid data received from the TCM, affecting transmission op...
U0410
DTC U0410 indicates a communication issue between vehicle control modules.
U0411
U0411 indicates an invalid data message from the ABS module, affecting vehicl...
U0412
Indicates you could face safety risks if the braking system doesn't operate c...
U0413
DTC U0413 indicates an invalid data issue from the ABS or EBCM.
U0414
U0414 indicates invalid data received from the Vehicle Dynamics Control Module.
U0415
U0415 indicates an invalid data signal from the ABS module.
U0416
U0416 indicates invalid data received from a vehicle control module.
U0417
DTC U0417 signifies invalid data from the ABS module.
U0418
U0418 indicates an invalid data issue from the ABS module affecting vehicle s...
U0419
DTC U0419 shows that there's invalid data being received from the ABS,
U041A
The Diagnostic Trouble Code (DTC) U041A indicates an issue with the communica...
U041B
Indicates a problem with the communication between the vehicle’s control modu...
U041C
The U041C diagnostic trouble code (DTC) indicates an issue with the communica...
U041D
U041D indicates a communication error between vehicle control modules.
U041E
U041E indicates a communication error between the engine control module and o...
U041F
U041F indicates invalid data received from a vehicle control module.
U0420
The U0420 code signifies that your vehicle's ECU is receiving invalid data fr...
U0421
U0421 indicates a communication error with the Battery Energy Control Module.
U0422
U0422 means invalid data received from a control module in your vehicle.
U0423
DTC U0423 indicates a communication error between your vehicle's control modu...
U0424
U0424 indicates that the vehicle control module is sending invalid data,
U0425
DTC U0425 signifies an invalid data signal from the ABS control module to the...
U0426
U0426 indicates a communication issue between the ECM and ABS control module.
U0427
DTC U0427 means the ECM received invalid data from the BCM.
U0428
U0428 indicates invalid data received from the Body Control Module,
U0429
The U0429 code indicates a malfunction in the data received from Vehicle Cont...
U042A
The DTC U042A refers to an issue where the vehicle's control module is receiv...
U042B
The U042B code indicates invalid data received from a control module.
U042C
U042C indicates invalid data received from a vehicle control module.
U042D
The U042D code indicates an invalid data signal from the steering angle sensor.
U042E
U042E means invalid data received from a control module.
U042F
U042F indicates invalid data received from the vehicle control module.
U0430
U0430 signifies invalid data received from a vehicle control module.
U0431
Indicates there's a disconnect between the data sent from the control modules...
U0432
DTC U0432 indicates an invalid data signal from the vehicle control module.
U0433
DTC U0433 signifies invalid data from a vehicle communication module.
U0434
DTC U0434 signifies invalid data received from a control module.
U0435
U0435 indicates invalid data received from the vehicle dynamics control modul...
U0436
The U0436 diagnostic trouble code indicates a problem with the vehicle's comm...
U0437
DTC U0437 is a diagnostic trouble code indicating that the vehicle's onboard ...
U0438
DTC U0438 indicates invalid data received from a vehicle control module,
U0439
DTC U0439 means the ECM has received invalid data from the Vehicle Dynamics C...
U043A
The U043K code indicates a communication error among vehicle control modules.
U043B
U043B indicates an invalid data message received from a control module in you...
U043C
DTC U043C indicates a communication error with the vehicle's control modules,...
U043D
DTC U043D indicates a communication error with the steering angle sensor module.
U043E
U043O indicates invalid data received from a vehicle control module.
U043F
U043P indicates a communication issue between control modules in your vehicle.
U0440
DTC U0440 indicates a communication failure between vehicle control modules.
U0441
DTC U0441 indicates a communication failure between control modules in the ve...
U0442
The U0442 code indicates a communication breakdown between vehicle ECUs.
U0443
DTC U0443 indicates a communication error between vehicle modules.
U0444
DTC U0444 indicates a communication error between vehicle control modules.
U0445
U0445 indicates a communication issue between vehicle control modules.
U0446
U0446 indicates a communication error between vehicle control modules.
U0447
The U0447 code indicates a communication error between vehicle control modules.
U0448
U0448 indicates a communication fault between vehicle modules,
U0449
DTC U0449 indicates a communication failure with an auxiliary control module ...
U044A
U044A indicates a communication issue between vehicle modules.
U044B
U044B indicates a communication error between vehicle control modules.
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