U04xx

181 generic network & communication codes in the U04xx range.Module-to-module communication across the vehicle data bus.

0 of these have been through editorial review and carry full diagnostic guidance.

Codes in this range

U0400Invalid Data ReceivedSeverity level 3 of 5: Diagnose soon.
U0401Invalid Data Received from ECM/PCMSeverity level 4 of 5: Get it looked at now.
U0402Invalid Data Received from TCMSeverity level 4 of 5: Get it looked at now.
U0403Invalid Data Received from Transfer Case Control ModuleSeverity level 3 of 5: Diagnose soon.
U0404Invalid Data Received from Gear Shift Control ModuleSeverity level 4 of 5: Get it looked at now.
U0405Invalid Data Received from Cruise Control ModuleSeverity level 3 of 5: Diagnose soon.
U0406Invalid Data Received from Cruise Control Front Distance Range SensorSeverity level 3 of 5: Diagnose soon.
U0407Invalid Data Received from Steering Angle Sensor ModuleSeverity level 5 of 5: Stop driving.
U0408Invalid Data Received from Vehicle Immobilizer Control ModuleSeverity level 3 of 5: Diagnose soon.
U0409Invalid Data Received from Vehicle Security Control ModuleSeverity level 2 of 5: Not urgent.
U040AInvalid Data Received From Air Conditioning Control ModuleSeverity level 2 of 5: Not urgent.
U040BInvalid Data Received From Exhaust Gas Recirculation Control Module ASeverity level 4 of 5: Get it looked at now.
U040CInvalid Data Received From Exhaust Gas Recirculation Control Module BSeverity level 4 of 5: Get it looked at now.
U040DInvalid Data Received From Turbocharger/Supercharger Control Module ASeverity level 4 of 5: Get it looked at now.
U040EInvalid Data Received From Turbocharger/Supercharger Control Module BSeverity level 4 of 5: Get it looked at now.
U040FInvalid Data Received From Reductant Control ModuleSeverity level 4 of 5: Get it looked at now.
U0410Invalid Data Received from Parking Brake Control ModuleSeverity level 5 of 5: Stop driving.
U0411Invalid Data Received from Wheel Speed Sensor (Front, Driver Side)Severity level 3 of 5: Diagnose soon.
U0412Invalid Data Received from Wheel Speed Sensor (Front, Passenger Side)Severity level 3 of 5: Diagnose soon.
U0413Invalid Data Received from Wheel Speed Sensor (Rear, Driver Side)Severity level 3 of 5: Diagnose soon.
U0414Invalid Data Received from 4WD Clutch Control ModuleSeverity level 3 of 5: Diagnose soon.
U0415Invalid Data Received from ABS Control ModuleSeverity level 5 of 5: Stop driving.
U0416Invalid Data Received from Vehicle Dynamics Control ModuleSeverity level 3 of 5: Diagnose soon.
U0417Invalid Data Received from Park Assist Control ModuleSeverity level 2 of 5: Not urgent.
U0418Invalid Data Received from Brake System Control ModuleSeverity level 5 of 5: Stop driving.
U0419Invalid Data Received from Brake System Control ModuleSeverity level 5 of 5: Stop driving.
U041AInvalid Data Received From Battery Isolation/Voltage Stabilization Control ModuleSeverity level 5 of 5: Stop driving.
U041BInvalid Data Received From Exhaust Gas Sensor Module ASeverity level 3 of 5: Diagnose soon.
U041CInvalid Data Received From Rocker Arm Control Module ASeverity level 4 of 5: Get it looked at now.
U041DInvalid Data Received From Rocker Arm Control Module BSeverity level 4 of 5: Get it looked at now.
U041EInvalid Data Received From All Wheel Drive Control ModuleSeverity level 4 of 5: Get it looked at now.
U041FInvalid Data Received From Throttle Actuator B Control ModuleSeverity level 4 of 5: Get it looked at now.
U0420Invalid Data Received from Power Steering Control ModuleSeverity level 5 of 5: Stop driving.
U0421Invalid Data Received from Throttle/Pedal Position SensorSeverity level 4 of 5: Get it looked at now.
U0422Invalid Data Received from Body Control ModuleSeverity level 3 of 5: Diagnose soon.
U0423Invalid Data Received from Information CenterSeverity level 2 of 5: Not urgent.
U0424Invalid Data Received from HVAC Control ModuleSeverity level 2 of 5: Not urgent.
U0425Invalid Data Received from Vehicle Immobilizer Control ModuleSeverity level 3 of 5: Diagnose soon.
U0426Invalid Data Received from Vehicle Immobiliser Control ModuleSeverity level 3 of 5: Diagnose soon.
U0427Invalid Data Received from Vehicle Security Control ModuleSeverity level 2 of 5: Not urgent.
U0428Invalid Data Received from Steering Angle Sensor ModuleSeverity level 5 of 5: Stop driving.
U0429Invalid Data Received from Steering Wheel Angle SensorSeverity level 5 of 5: Stop driving.
U042AInvalid Data Received From V2X ModuleSeverity level 2 of 5: Not urgent.
U042BInvalid Data Received From Chassis Control Module ASeverity level 4 of 5: Get it looked at now.
U042CInvalid Data Received From Chassis Control Module BSeverity level 4 of 5: Get it looked at now.
U042DInvalid Data Received From Active Vibration Control ModuleSeverity level 2 of 5: Not urgent.
U042EInvalid Data Received From Generator A Control ModuleSeverity level 4 of 5: Get it looked at now.
U042FInvalid Data Received From Camshaft Position Control ModuleSeverity level 4 of 5: Get it looked at now.
U0430Invalid Data Received from Tire Pressure Monitoring SensorSeverity level 2 of 5: Not urgent.
U0431Invalid Data Received from Body Control ModuleSeverity level 2 of 5: Not urgent.
U0432Invalid Data Received from 4-Wheel Drive Clutch Control ModuleSeverity level 3 of 5: Diagnose soon.
U0433Invalid Data Received From Front Distance Range Sensor — Single Sensor or CenterSeverity level 3 of 5: Diagnose soon.
U0434Invalid Data Received From Active Roll Control ModuleSeverity level 4 of 5: Get it looked at now.
U0435Invalid Data Received From Power Steering Control Module — RearSeverity level 5 of 5: Stop driving.
U0436Invalid Data Received From Differential Control Module — FrontSeverity level 4 of 5: Get it looked at now.
U0437Invalid Data Received From Differential Control Module — RearSeverity level 4 of 5: Get it looked at now.
U0438Invalid Data Received from Park Brake Control ModuleSeverity level 5 of 5: Stop driving.
U0439Invalid Data Received From All Terrain Control ModuleSeverity level 2 of 5: Not urgent.
U043AInvalid Data Received From Suspension Control Module BSeverity level 4 of 5: Get it looked at now.
U043BInvalid Data Received From Front Distance Range Sensor — LeftSeverity level 3 of 5: Diagnose soon.
U043CInvalid Data Received From Front Distance Range Sensor — RightSeverity level 3 of 5: Diagnose soon.
U043DInvalid Data Received From Accelerator Pedal ModuleSeverity level 4 of 5: Get it looked at now.
U043EInvalid Data Received From Vacuum Sensor ASeverity level 3 of 5: Diagnose soon.
U043FInvalid Data Received From Vacuum Sensor BSeverity level 3 of 5: Diagnose soon.
U0440Invalid Data Received from Drive Motor Control ModuleSeverity level 4 of 5: Get it looked at now.
U0441Invalid Data Received From Emissions Critical Control InformationSeverity level 3 of 5: Diagnose soon.
U0442Invalid Data Received From ECM/PCM BSeverity level 4 of 5: Get it looked at now.
U0443Invalid Data Received From Body Control Module BSeverity level 2 of 5: Not urgent.
U0444Invalid Data Received From Body Control Module CSeverity level 2 of 5: Not urgent.
U0445Invalid Data Received From Body Control Module DSeverity level 2 of 5: Not urgent.
U0446Invalid Data Received From Body Control Module ESeverity level 2 of 5: Not urgent.
U0447Invalid Data Received from Gateway ASeverity level 3 of 5: Diagnose soon.
U0448Invalid Data Received from Gateway BSeverity level 3 of 5: Diagnose soon.
U0449Invalid Data Received From Serial Data Gateway Module CSeverity level 4 of 5: Get it looked at now.
U044AInvalid Data Received From Serial Data Gateway Module DSeverity level 4 of 5: Get it looked at now.
U044BInvalid Data Received From Battery Energy Control Module CSeverity level 4 of 5: Get it looked at now.
U044CInvalid Data Received From Hybrid/EV Battery Inductive Charging ModuleSeverity level 3 of 5: Diagnose soon.
U044DInvalid Data Received From Generator B Control ModuleSeverity level 4 of 5: Get it looked at now.
U044FInvalid Data Received From Mirror Control Module BSeverity level 2 of 5: Not urgent.
U0451Invalid Data Received From Serial Data Gateway Module ESeverity level 4 of 5: Get it looked at now.
U0452Invalid Data Received From Restraints Control ModuleSeverity level 5 of 5: Stop driving.
U0453Invalid Data Received From Side Restraints Control Module — LeftSeverity level 5 of 5: Stop driving.
U0454Invalid Data Received From Side Restraints Control Module — RightSeverity level 5 of 5: Stop driving.
U0455Invalid Data Received From Restraints Occupant Classification System ModuleSeverity level 5 of 5: Stop driving.
U0456Invalid Data Received From Coolant Temperature Control ModuleSeverity level 3 of 5: Diagnose soon.
U0457Invalid Data Received From Information Center ASeverity level 2 of 5: Not urgent.
U0458Invalid Data Received From Information Center BSeverity level 2 of 5: Not urgent.
U0459Invalid Data Received From Head Up DisplaySeverity level 2 of 5: Not urgent.
U045AInvalid Data Received From Parking Assist Control Module ASeverity level 2 of 5: Not urgent.
U045BInvalid Data Received From Anti-Lock Brake System (ABS) Control Module BSeverity level 5 of 5: Stop driving.
U045CInvalid Data Received From Power Steering Control Module BSeverity level 5 of 5: Stop driving.
U045DInvalid Data Received From Automated Driving System Control Module ASeverity level 4 of 5: Get it looked at now.
U045EInvalid Data Received From Automated Driving System Control Module BSeverity level 4 of 5: Get it looked at now.
U045FInvalid Data Received From Automated Driving System Interface Module ASeverity level 4 of 5: Get it looked at now.
U0460Invalid Data Received From Automated Driving System Interface Module BSeverity level 4 of 5: Get it looked at now.
U0461Invalid Data Received From Audible Alert Control ModuleSeverity level 2 of 5: Not urgent.
U0462Invalid Data Received From Compass ModuleSeverity level 2 of 5: Not urgent.
U0463Invalid Data Received From Navigation Display ModuleSeverity level 2 of 5: Not urgent.
U0464Invalid Data Received From Navigation Control ModuleSeverity level 2 of 5: Not urgent.
U0465Invalid Data Received From PTO Control ModuleSeverity level 2 of 5: Not urgent.
U0466Invalid Data Received From HVAC Control Module — RearSeverity level 2 of 5: Not urgent.
U0467Invalid Data Received From Fuel Additive Control ModuleSeverity level 3 of 5: Diagnose soon.
U0468Invalid Data Received From Fuel Cell Control ModuleSeverity level 4 of 5: Get it looked at now.
U0469Invalid Data Received From Starter / Generator Control ModuleSeverity level 4 of 5: Get it looked at now.
U046AInvalid Data Received From Sunroof Control ModuleSeverity level 2 of 5: Not urgent.
U046BInvalid Data Received From Global Positioning System ModuleSeverity level 2 of 5: Not urgent.
U046CInvalid Data Received From A/C Compressor Control ModuleSeverity level 2 of 5: Not urgent.
U046DInvalid Data Received From Fuel Pump Control Module BSeverity level 4 of 5: Get it looked at now.
U046EInvalid Data Received From Exhaust Gas Sensor Module BSeverity level 3 of 5: Diagnose soon.
U0471Invalid Data Received From Restraints System Sensor ASeverity level 5 of 5: Stop driving.
U0472Invalid Data Received From Restraints System Sensor BSeverity level 5 of 5: Stop driving.
U0473Invalid Data Received From Restraints System Sensor CSeverity level 5 of 5: Stop driving.
U0474Invalid Data Received From Restraints System Sensor DSeverity level 5 of 5: Stop driving.
U0475Invalid Data Received From Restraints System Sensor ESeverity level 5 of 5: Stop driving.
U0476Invalid Data Received from Driver Assistance SystemSeverity level 3 of 5: Diagnose soon.
U0477Invalid Data Received From Restraints System Sensor GSeverity level 5 of 5: Stop driving.
U0478Invalid Data Received From Restraints System Sensor HSeverity level 5 of 5: Stop driving.
U0479Invalid Data Received From Restraints System Sensor ISeverity level 5 of 5: Stop driving.
U047AInvalid Data Received From Restraints System Sensor JSeverity level 5 of 5: Stop driving.
U047BInvalid Data Received From Restraints System Sensor KSeverity level 5 of 5: Stop driving.
U047CInvalid Data Received From Restraints System Sensor LSeverity level 5 of 5: Stop driving.
U047DInvalid Data Received From Restraints System Sensor MSeverity level 5 of 5: Stop driving.
U047EInvalid Data Received From Restraints System Sensor NSeverity level 5 of 5: Stop driving.
U047FInvalid Data Received From Seat Belt Pretensioner Module ASeverity level 5 of 5: Stop driving.
U0480Invalid Data Received From Seat Belt Pretensioner Module BSeverity level 5 of 5: Stop driving.
U0481Invalid Data Received From Automatic Lighting Control ModuleSeverity level 2 of 5: Not urgent.
U0482Invalid Data Received From Headlamp Leveling Control Module ASeverity level 3 of 5: Diagnose soon.
U0483Invalid Data Received From Lighting Control Module — FrontSeverity level 2 of 5: Not urgent.
U0484Invalid Data Received From Lighting Control Module — Rear ASeverity level 2 of 5: Not urgent.
U0485Invalid Data Received From RadioSeverity level 2 of 5: Not urgent.
U0486Invalid Data Received From Antenna Control ModuleSeverity level 2 of 5: Not urgent.
U0487Invalid Data Received From Audio Amplifier ASeverity level 2 of 5: Not urgent.
U0488Invalid Data Received From Digital Disc Player/Changer Module ASeverity level 2 of 5: Not urgent.
U0489Invalid Data Received From Digital Disc Player/Changer Module BSeverity level 2 of 5: Not urgent.
U048AInvalid Data Received From Digital Disc Player/Changer Module CSeverity level 2 of 5: Not urgent.
U048BInvalid Data Received From Headlamp Leveling Control Module BSeverity level 3 of 5: Diagnose soon.
U0491Invalid Data Received From Digital Disc Player/Changer Module DSeverity level 2 of 5: Not urgent.
U0492Invalid Data Received From TelevisionSeverity level 2 of 5: Not urgent.
U0493Invalid Data Received From Personal ComputerSeverity level 2 of 5: Not urgent.
U0494Invalid Data Received From Digital Audio Control Module ASeverity level 2 of 5: Not urgent.
U0495Invalid Data Received From Digital Audio Control Module BSeverity level 2 of 5: Not urgent.
U0496Invalid Data Received From Subscription Entertainment Receiver ModuleSeverity level 2 of 5: Not urgent.
U0497Invalid Data Received From Entertainment Control Module — Rear ASeverity level 2 of 5: Not urgent.
U0498Invalid Data Received From Telephone Control ModuleSeverity level 2 of 5: Not urgent.
U0499Invalid Data Received From Telematic Control ModuleSeverity level 2 of 5: Not urgent.
U049AInvalid Data Received From Door Control Module ASeverity level 2 of 5: Not urgent.
U049BInvalid Data Received From Tachograph ModuleSeverity level 3 of 5: Diagnose soon.
U049CInvalid Data Received From Battery Charger Control Module ASeverity level 4 of 5: Get it looked at now.
U049DInvalid Data Received From Glow Plug Control Module 2Severity level 3 of 5: Diagnose soon.
U049EInvalid Data Received From Direct Ozone Reduction Catalyst Temperature SensorSeverity level 3 of 5: Diagnose soon.
U049FInvalid Data Received From Transmission Range Control ModuleSeverity level 4 of 5: Get it looked at now.
U04A0Invalid Data Received From Engine Coolant Pump Control ModuleSeverity level 4 of 5: Get it looked at now.
U04A1Invalid Data Received From Hybrid/EV Battery Interface Control Module ASeverity level 4 of 5: Get it looked at now.
U04A2Invalid Data Received From Hybrid/EV Battery Interface Control Module BSeverity level 4 of 5: Get it looked at now.
U04A3Invalid Data Received From Hybrid/EV Battery Interface Control Module CSeverity level 4 of 5: Get it looked at now.
U04A4Invalid Data Received From Particulate Matter Sensor ASeverity level 3 of 5: Diagnose soon.
U04A5Invalid Data Received From Hybrid/EV Battery Interface Control Module ESeverity level 4 of 5: Get it looked at now.
U04A6Invalid Data Received From Hybrid/EV Battery Interface Control Module FSeverity level 4 of 5: Get it looked at now.
U04A7Invalid Data Received From Hybrid/EV Battery Interface Control Module GSeverity level 4 of 5: Get it looked at now.
U04A8Invalid Data Received From Hybrid/EV Battery Interface Control Module HSeverity level 4 of 5: Get it looked at now.
U04A9Invalid Data Received From Hybrid/EV Battery Interface Control Module ISeverity level 4 of 5: Get it looked at now.
U04AAInvalid Data Received From Hybrid/EV Battery Interface Control Module JSeverity level 4 of 5: Get it looked at now.
U04ABInvalid Data Received From Hybrid/EV Battery Interface Control Module KSeverity level 4 of 5: Get it looked at now.
U04ACInvalid Data Received From Hybrid/EV Battery Interface Control Module LSeverity level 4 of 5: Get it looked at now.
U04ADInvalid Data Received From Hybrid/EV Battery Interface Control Module MSeverity level 4 of 5: Get it looked at now.
U04AEInvalid Data Received From Hybrid/EV Battery Interface Control Module NSeverity level 4 of 5: Get it looked at now.
U04AFInvalid Data Received From Hybrid/EV Battery Interface Control Module OSeverity level 4 of 5: Get it looked at now.
U04B0Invalid Data Received From Hybrid/EV Battery Interface Control Module PSeverity level 4 of 5: Get it looked at now.
U04B1Invalid Data Received From Battery Monitor ModuleSeverity level 3 of 5: Diagnose soon.
U04B2Invalid Data Received From Particulate Matter Sensor BSeverity level 3 of 5: Diagnose soon.
U04B3Invalid Data Received From Planetary Gear Set Control ModuleSeverity level 4 of 5: Get it looked at now.
U04B4Invalid Data Received From Brake Blending ActuatorSeverity level 5 of 5: Stop driving.
U04B5Invalid Data Received From Brake System Control Module BSeverity level 5 of 5: Stop driving.
U04B6Invalid Data Received From Catalyst Heater Control ModuleSeverity level 3 of 5: Diagnose soon.
U04BAInvalid Data Received From Switch Input Module ASeverity level 2 of 5: Not urgent.
U04BBInvalid Data Received From Switch Input Module BSeverity level 2 of 5: Not urgent.
U04BCInvalid Data Received From Switch Input Module CSeverity level 2 of 5: Not urgent.
U04BDInvalid Data Received From Park Lock/Pawl Control ModuleSeverity level 4 of 5: Get it looked at now.
U04BEInvalid Data Received From Battery Charger Control Module BSeverity level 4 of 5: Get it looked at now.
U04BFInvalid Data Received From Drive Motor A Clutch ActuatorSeverity level 4 of 5: Get it looked at now.
U04C0Invalid Data Received From Battery Management Control ModuleSeverity level 4 of 5: Get it looked at now.