Network Codes
1,532 OBD-II diagnostic trouble codes in this category.
Showing page 6 of 16 (1,532 codes total)
| Code | Description | Subsystem | Severity |
|---|---|---|---|
| U031C | Software Incompatibility With Brake System Control Module B | Software | Medium |
| U031D | Software Incompatibility With Parking Assist Control Module A | Software | Medium |
| U031E | Software Incompatibility With Parking Assist Control Module B | Software | Medium |
| U031F | Software Incompatibility With Accessory Protocol Interface Module | Software | Medium |
| U0320 | Software Incompatibility With Power Steering Control Module | Software | Medium |
| U0321 | Software Incompatibility With Suspension Control Module A | Software | Medium |
| U0322 | Software Incompatibility With Body Control Module | Software | Medium |
| U0323 | Software Incompatibility With Instrument Panel Control Module | Software | Medium |
| U0324 | Software Incompatibility With HVAC Control Module | Software | Medium |
| U0325 | Software Incompatibility With Auxiliary Heater Control Module | Software | Medium |
| U0326 | Software Incompatibility With Vehicle Immobilizer Control Module | Software | Medium |
| U0327 | Software Incompatibility With Vehicle Security Control Module | Software | Medium |
| U0328 | Software Incompatibility With Steering Angle Sensor Module | Software | Medium |
| U0329 | Software Incompatibility With Steering Column Control Module | Software | Medium |
| U032A | Software Incompatibility With A/C Compressor Control Module | Software | Medium |
| U0330 | Software Incompatibility With Tire Pressure Monitor Module | Software | Medium |
| U0331 | Software Incompatibility With Body Control Module A | Software | Medium |
| U0332 | Software Incompatibility With Multi-axis Acceleration Sensor Module A | Software | Medium |
| U0333 | Software Incompatibility With Gear Shift Control Module B | Software | Medium |
| U0334 | Software Incompatibility With Radio | Software | Medium |
| U0335 | Software Incompatibility With Hybrid/EV Battery Pack Sensor Module | Software | Medium |
| U0336 | Software Incompatibility With Restraints Control Module | Software | Medium |
| U0337 | Software Incompatibility With Battery Charger Control Module A | Software | Medium |
| U0338 | Software Incompatibility With Remote Function Actuation Module | Software | Medium |
| U0339 | Software Incompatibility With Body Control Module B | Software | Medium |
| U033A | Software Incompatibility With Hybrid/EV Battery Interface Control Module A | Software | Medium |
| U033B | Software Incompatibility With Hybrid/EV Battery Interface Control Module B | Software | Medium |
| U033C | Software Incompatibility With Hybrid/EV Battery Interface Control Module C | Software | Medium |
| U033D | Software Incompatibility With Hybrid/EV Battery Interface Control Module D | Software | Medium |
| U033E | Software Incompatibility With Hybrid/EV Battery Interface Control Module E | Software | Medium |
| U033F | Software Incompatibility With Hybrid/EV Battery Interface Control Module F | Software | Medium |
| U0340 | Software Incompatibility With Hybrid/EV Battery Interface Control Module G | Software | Medium |
| U0341 | Software Incompatibility With Hybrid/EV Battery Interface Control Module H | Software | Medium |
| U0342 | Software Incompatibility With Hybrid/EV Battery Interface Control Module I | Software | Medium |
| U0343 | Software Incompatibility With Hybrid/EV Battery Interface Control Module J | Software | Medium |
| U0344 | Software Incompatibility With Hybrid/EV Battery Interface Control Module K | Software | Medium |
| U0345 | Software Incompatibility With Hybrid/EV Battery Interface Control Module L | Software | Medium |
| U0346 | Software Incompatibility With Hybrid/EV Battery Interface Control Module M | Software | Medium |
| U0347 | Software Incompatibility With Hybrid/EV Battery Interface Control Module N | Software | Medium |
| U0348 | Software Incompatibility With Hybrid/EV Battery Interface Control Module O | Software | Medium |
| U0349 | Software Incompatibility With Hybrid/EV Battery Interface Control Module P | Software | Medium |
| U034A | Software Incompatibility With Engine Disconnect Clutch | Software | Medium |
| U034B | Software Incompatibility With Brake Booster Control | Software | Medium |
| U034C | Software Incompatibility With Battery Energy Control Module C | Software | Medium |
| U034D | Software Incompatibility With Vehicle Thermal Management Control Module | Software | Medium |
| U034E | Software Incompatibility With Active Grille Air Shutter Module A | Software | Medium |
| U034F | Software Incompatibility With Active Grille Air Shutter Module B | Software | Medium |
| U0350 | Software Incompatibility With Active Grille Air Shutter Module C | Software | Medium |
| U0351 | Software Incompatibility With Active Grille Air Shutter Module D | Software | Medium |
| U0352 | Software Incompatibility With NOx Sensor C | Software | Medium |
| U0353 | Software Incompatibility With Ion Sense Module | Software | Medium |
| U0354 | Software Incompatibility With Hybrid/EV Battery Inductive Charger Control Module | Software | Medium |
| U0400 | Invalid Data Received | Data Integrity | High |
| U0401 | Invalid Data Received from ECM/PCM | Data Error | Medium |
| U0402 | Invalid Data Received From TCM | Data Integrity | High |
| U0403 | Invalid Data Received From Transfer Case Control Module | Data Integrity | High |
| U0404 | Invalid Data Received From Gear Shift Module | Data Integrity | Medium |
| U0405 | Invalid Data Received From Cruise Control Module | Data Integrity | High |
| U0406 | Invalid Data Received From Fuel Injector Control Module | Data Integrity | High |
| U0407 | Invalid Data Received From Glow Plug Control Module 1 | Data Integrity | High |
| U0408 | Invalid Data Received From Throttle Actuator A Control Module | Data Integrity | High |
| U0409 | Invalid Data Received From Alternative Fuel Control Module | Data Integrity | High |
| U040A | Invalid Data Received From Air Conditioning Control Module | Data Integrity | High |
| U040B | Invalid Data Received From Exhaust Gas Recirculation Control Module A | Data Integrity | High |
| U040C | Invalid Data Received From Exhaust Gas Recirculation Control Module B | Data Integrity | High |
| U040D | Invalid Data Received From Turbocharger/Supercharger Control Module A | Data Integrity | High |
| U040E | Invalid Data Received From Turbocharger/Supercharger Control Module B | Data Integrity | High |
| U040F | Invalid Data Received From Reductant Control Module | Data Integrity | High |
| U0410 | Invalid Data Received From Fuel Pump Control Module A | Data Integrity | High |
| U0411 | Invalid Data Received From Drive Motor Control Module A | Data Integrity | High |
| U0412 | Invalid Data Received From Battery Energy Control Module A | Data Integrity | High |
| U0413 | Invalid Data Received From Battery Energy Control Module B | Data Integrity | High |
| U0414 | Invalid Data Received From Four-Wheel Drive Clutch Control Module | Data Integrity | High |
| U0415 | Invalid Data Received From Anti-Lock Brake System Module | Data Integrity | High |
| U0416 | Invalid Data Received From Vehicle Dynamics Control Module | Data Integrity | High |
| U0417 | Invalid Data Received From Park Brake Control Module | Data Integrity | High |
| U0418 | Invalid Data Received From Brake System Control Module A | Data Integrity | High |
| U0419 | Invalid Data Received From Steering Effort Control Module | Data Integrity | High |
| U041A | Invalid Data Received From Battery Isolation/Voltage Stabilization Control Module | Data Integrity | High |
| U041B | Invalid Data Received From Exhaust Gas Sensor Module A | Data Integrity | High |
| U041C | Invalid Data Received From Rocker Arm Control Module A | Data Integrity | High |
| U041D | Invalid Data Received From Rocker Arm Control Module B | Data Integrity | High |
| U041E | Invalid Data Received From All Wheel Drive Control Module | Data Integrity | High |
| U041F | Invalid Data Received From Throttle Actuator B Control Module | Data Integrity | High |
| U0420 | Invalid Data Received From Power Steering Control Module A | Data Integrity | High |
| U0421 | Invalid Data Received From Suspension Control Module A | Data Integrity | High |
| U0422 | Invalid Data Received From Body Control Module | Data Integrity | Medium |
| U0423 | Invalid Data Received From Instrument Panel Cluster Control Module | Data Integrity | High |
| U0424 | Invalid Data Received From HVAC Control Module | Data Integrity | High |
| U0425 | Invalid Data Received From Auxiliary Heater Control Module | Data Integrity | High |
| U0426 | Invalid Data Received From Instrument Panel Control Module | Data Integrity | Medium |
| U0427 | Invalid Data Received From Vehicle Security Control Module | Data Integrity | High |
| U0428 | Invalid Data Received From Steering Angle Sensor Module | Data Integrity | High |
| U0429 | Invalid Data Received From Steering Column Control Module | Data Integrity | High |
| U042A | Invalid Data Received From V2X Module | Data Integrity | High |
| U042B | Invalid Data Received From Chassis Control Module A | Data Integrity | High |
| U042C | Invalid Data Received From Chassis Control Module B | Data Integrity | High |
| U042D | Invalid Data Received from Active Vibration Control Module | Data Integrity | High |
| U042E | Invalid Data Received From Generator A Control Module | Data Integrity | High |
| U042F | Invalid Data Received From Camshaft Position Control Module | Data Integrity | High |
About Network Codes
This page lists all 1,532 OBD-II diagnostic trouble codes classified under the Network category. These codes are stored by your vehicle's onboard computer when a sensor detects a malfunction in the network system. Each code begins with a letter indicating the system (P for Powertrain, B for Body, C for Chassis, U for Network) followed by four digits that identify the specific fault.
When your check engine light comes on, an OBD-II scanner reads these stored codes to help pinpoint the problem. Generic codes (where the second digit is 0) follow the SAE J2012 standard and mean the same thing on every vehicle. Manufacturer-specific codes (where the second digit is 1) may have different meanings depending on the vehicle brand.
Click any code in the table above to see its full description, possible causes, common symptoms, and step-by-step repair guidance. Use the search box to quickly find a specific code within this category.