U01xx

182 generic network & communication codes in the U01xx range.Module-to-module communication across the vehicle data bus.

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

Codes in this range

U0100Lost Communication with ECM/PCM "A"Severity level 4 of 5: Get it looked at now.
U0101Lost Communication with TCMSeverity level 4 of 5: Get it looked at now.
U0102Lost Communication with Transfer Case Control ModuleSeverity level 4 of 5: Get it looked at now.
U0103Lost Communication with Gear Shift ModuleSeverity level 4 of 5: Get it looked at now.
U0104Lost Communication with Cruise Control ModuleSeverity level 3 of 5: Diagnose soon.
U0105Lost Communication with Fuel Injector Control ModuleSeverity level 4 of 5: Get it looked at now.
U0106Lost Communication with Glow Plug Control ModuleSeverity level 3 of 5: Diagnose soon.
U0107Lost Communication with Throttle Actuator Control ModuleSeverity level 4 of 5: Get it looked at now.
U0108Lost Communication With Alternative Fuel Control ModuleSeverity level 3 of 5: Diagnose soon.
U0109Lost Communication with Fuel Pump Control ModuleSeverity level 4 of 5: Get it looked at now.
U010ALost Communication With Exhaust Gas Recirculation Control Module ASeverity level 3 of 5: Diagnose soon.
U010BLost Communication With Exhaust Gas Recirculation Control Module BSeverity level 3 of 5: Diagnose soon.
U010CLost Communication With Turbocharger/Supercharger Control Module ASeverity level 4 of 5: Get it looked at now.
U010DLost Communication With Turbocharger/Supercharger Control Module BSeverity level 4 of 5: Get it looked at now.
U010ELost Communication With Reductant Control ModuleSeverity level 4 of 5: Get it looked at now.
U010FLost Communication With Air Conditioning Control ModuleSeverity level 3 of 5: Diagnose soon.
U0110Lost Communication with Drive Motor Control ModuleSeverity level 4 of 5: Get it looked at now.
U0111Lost Communication with Battery Energy Control ModuleSeverity level 4 of 5: Get it looked at now.
U0112Lost Communication with Battery Energy Control Module "B"Severity level 4 of 5: Get it looked at now.
U0113Lost Communication with Battery Charger A Control ModuleSeverity level 3 of 5: Diagnose soon.
U0114Lost Communication with 4WD Clutch Control ModuleSeverity level 3 of 5: Diagnose soon.
U0115Lost Communication with ECM/PCM "B"Severity level 4 of 5: Get it looked at now.
U0116Lost Communication with Steering Effort Control ModuleSeverity level 5 of 5: Stop driving.
U0117Lost Communication with Drive Motor Control Module 2Severity level 4 of 5: Get it looked at now.
U0118Lost Communication with Cabin Air Quality Sensor ModuleSeverity level 2 of 5: Not urgent.
U0119Lost Communication with Steering Column Control ModuleSeverity level 5 of 5: Stop driving.
U011ALost Communication With Exhaust Gas Sensor Module ASeverity level 3 of 5: Diagnose soon.
U011BLost Communication With Rocker Arm Control Module ASeverity level 3 of 5: Diagnose soon.
U011CLost Communication With Rocker Arm Control Module BSeverity level 3 of 5: Diagnose soon.
U011DLost Communication With All Wheel Drive Control ModuleSeverity level 4 of 5: Get it looked at now.
U011ELost Communication With Throttle Actuator B Control ModuleSeverity level 4 of 5: Get it looked at now.
U011FLost Communication With V2X ModuleSeverity level 3 of 5: Diagnose soon.
U0120Lost Communication with Starter/Generator Control ModuleSeverity level 3 of 5: Diagnose soon.
U0121Lost Communication with ABS Control ModuleSeverity level 4 of 5: Get it looked at now.
U0122Lost Communication with Vehicle Dynamics Control ModuleSeverity level 3 of 5: Diagnose soon.
U0123Lost Communication with Yaw Rate Sensor ModuleSeverity level 3 of 5: Diagnose soon.
U0124Lost Communication with Lateral Acceleration Sensor ModuleSeverity level 3 of 5: Diagnose soon.
U0125Lost Communication with Multi-axis Acceleration SensorSeverity level 3 of 5: Diagnose soon.
U0126Lost Communication with Steering Angle Sensor ModuleSeverity level 5 of 5: Stop driving.
U0127Lost Communication with Tire Pressure Monitor ModuleSeverity level 2 of 5: Not urgent.
U0128Lost Communication with Park Brake Control ModuleSeverity level 5 of 5: Stop driving.
U0129Lost Communication with Brake System Control ModuleSeverity level 5 of 5: Stop driving.
U012ALost Communication With Chassis Control Module ASeverity level 4 of 5: Get it looked at now.
U012BLost Communication With Chassis Control Module BSeverity level 4 of 5: Get it looked at now.
U012CLost Communication With Active Vibration Control ModuleSeverity level 3 of 5: Diagnose soon.
U012DLost Communication With Generator A Control ModuleSeverity level 3 of 5: Diagnose soon.
U012ELost Communication With Camshaft Position Control ModuleSeverity level 3 of 5: Diagnose soon.
U012FLost Communication With Generator B Control ModuleSeverity level 3 of 5: Diagnose soon.
U0130Lost Communication with Steering Effort Control Module BSeverity level 5 of 5: Stop driving.
U0131Lost Communication with Power Steering Control ModuleSeverity level 5 of 5: Stop driving.
U0132Lost Communication with Ride Level Control ModuleSeverity level 3 of 5: Diagnose soon.
U0133Lost Communication with Yaw Rate Sensor ModuleSeverity level 4 of 5: Get it looked at now.
U0134Lost Communication with Restraints System Sensor (Side Sensor)Severity level 5 of 5: Stop driving.
U0135Lost Communication with Parking Brake Control ModuleSeverity level 5 of 5: Stop driving.
U0136Lost Communication with Park Brake Module BSeverity level 5 of 5: Stop driving.
U0137Lost Communication with Trailer Brake Control ModuleSeverity level 5 of 5: Stop driving.
U0138Lost Communication with All Terrain Control ModuleSeverity level 3 of 5: Diagnose soon.
U0139Lost Communication with Active Roll Control ModuleSeverity level 3 of 5: Diagnose soon.
U013CLost Communication With Accelerator Pedal ModuleSeverity level 4 of 5: Get it looked at now.
U013DLost Communication With Vacuum Sensor ASeverity level 3 of 5: Diagnose soon.
U013ELost Communication With Vacuum Sensor BSeverity level 3 of 5: Diagnose soon.
U013FLost Communication With Pedestrian Alert Control ModuleSeverity level 3 of 5: Diagnose soon.
U0140Lost Communication with Body Control ModuleSeverity level 3 of 5: Diagnose soon.
U0141Lost Communication with Body Control Module ASeverity level 3 of 5: Diagnose soon.
U0142Lost Communication with Body Control Module BSeverity level 3 of 5: Diagnose soon.
U0143Lost Communication with Body Control Module CSeverity level 3 of 5: Diagnose soon.
U0144Lost Communication with Personalization Module "B"Severity level 2 of 5: Not urgent.
U0145Lost Communication with Restraints Control Module AuxiliarySeverity level 5 of 5: Stop driving.
U0146Lost Communication with Gateway "A"Severity level 4 of 5: Get it looked at now.
U0147Lost Communication with Gateway "B"Severity level 4 of 5: Get it looked at now.
U0148Lost Communication with Body Control Module "C"Severity level 3 of 5: Diagnose soon.
U0149Lost Communication with Door Driver ModuleSeverity level 2 of 5: Not urgent.
U014ALost Communication With Battery Energy Control Module CSeverity level 4 of 5: Get it looked at now.
U014BLost Communication With Hybrid/EV Battery Inductive Charging ModuleSeverity level 3 of 5: Diagnose soon.
U014CLost Communication With Battery Energy Control Module DSeverity level 4 of 5: Get it looked at now.
U014DLost Communication with Mirror Control Module BSeverity level 3 of 5: Diagnose soon.
U014ELost Communication With Multi-axis Acceleration Sensor Module BSeverity level 4 of 5: Get it looked at now.
U0150Lost Communication with Side Object Detection Control Module LeftSeverity level 2 of 5: Not urgent.
U0151Lost Communication with Restraints Control ModuleSeverity level 5 of 5: Stop driving.
U0152Lost Communication with Side Restraints Control Module LeftSeverity level 5 of 5: Stop driving.
U0153Lost Communication with Restraints Control Module BSeverity level 5 of 5: Stop driving.
U0154Lost Communication with Restraints Occupant Sensing ModuleSeverity level 5 of 5: Stop driving.
U0155Lost Communication with Instrument Panel ClusterSeverity level 3 of 5: Diagnose soon.
U0156Lost Communication with Information Center "A"Severity level 2 of 5: Not urgent.
U0157Lost Communication with Personalization Control ModuleSeverity level 2 of 5: Not urgent.
U0158Lost Communication with Head Up DisplaySeverity level 2 of 5: Not urgent.
U0159Lost Communication with Parking Assist ModuleSeverity level 2 of 5: Not urgent.
U015ALost Communication With Anti-Lock Brake System (ABS) Control Module BSeverity level 5 of 5: Stop driving.
U015BLost Communication With Power Steering Control Module BSeverity level 5 of 5: Stop driving.
U015CLost Communication With Automated Driving System Control Module ASeverity level 4 of 5: Get it looked at now.
U015DLost Communication With Automated Driving System Control Module BSeverity level 4 of 5: Get it looked at now.
U015ELost Communication With Automated Driving System Interface Module ASeverity level 4 of 5: Get it looked at now.
U015FLost Communication With Automated Driving System Interface Module BSeverity level 4 of 5: Get it looked at now.
U0160Lost Communication with Audible Alert Control ModuleSeverity level 2 of 5: Not urgent.
U0161Lost Communication with Compass ModuleSeverity level 2 of 5: Not urgent.
U0162Lost Communication with Navigation Display ModuleSeverity level 2 of 5: Not urgent.
U0163Lost Communication with Navigation Control ModuleSeverity level 2 of 5: Not urgent.
U0164Lost Communication with HVAC Control ModuleSeverity level 2 of 5: Not urgent.
U0165Lost Communication with Auxiliary HVAC Control ModuleSeverity level 2 of 5: Not urgent.
U0166Lost Communication with Auxiliary Heater Control ModuleSeverity level 2 of 5: Not urgent.
U0167Lost Communication with Vehicle Immobiliser Control ModuleSeverity level 3 of 5: Diagnose soon.
U0168Lost Communication with Vehicle Immobilizer Control ModuleSeverity level 4 of 5: Get it looked at now.
U0169Lost Communication with Sun Roof Control ModuleSeverity level 2 of 5: Not urgent.
U016ALost Communication With Global Positioning System ModuleSeverity level 3 of 5: Diagnose soon.
U016BLost Communication With A/C Compressor Control ModuleSeverity level 3 of 5: Diagnose soon.
U016CLost Communication With Fuel Pump Control Module BSeverity level 4 of 5: Get it looked at now.
U016DLost Communication With Exhaust Gas Sensor Module BSeverity level 3 of 5: Diagnose soon.
U0170Lost Communication with Restraints Front Sensor "B"Severity level 5 of 5: Stop driving.
U0171Lost Communication with Restraints Rear Sensor "A"Severity level 5 of 5: Stop driving.
U0172Lost Communication with Restraints Rear Sensor "B"Severity level 5 of 5: Stop driving.
U0173Communication Bus "C" OffSeverity level 4 of 5: Get it looked at now.
U0174Lost Communication With Restraints System Sensor ESeverity level 5 of 5: Stop driving.
U0175Lost Communication With Restraints System Sensor FSeverity level 5 of 5: Stop driving.
U0176Lost Communication With Restraints System Sensor GSeverity level 5 of 5: Stop driving.
U0177Lost Communication with Mirror Memory ModuleSeverity level 2 of 5: Not urgent.
U0178Lost Communication With Restraints System Sensor ISeverity level 5 of 5: Stop driving.
U0179Lost Communication with Power Liftgate Control ModuleSeverity level 2 of 5: Not urgent.
U017ALost Communication With Restraints System Sensor KSeverity level 5 of 5: Stop driving.
U017BLost Communication With Restraints System Sensor LSeverity level 5 of 5: Stop driving.
U017CLost Communication With Restraints System Sensor MSeverity level 5 of 5: Stop driving.
U017DLost Communication With Restraints System Sensor NSeverity level 5 of 5: Stop driving.
U017ELost Communication With Seat Belt Pretensioner Module ASeverity level 5 of 5: Stop driving.
U017FLost Communication With Seat Belt Pretensioner Module BSeverity level 5 of 5: Stop driving.
U0180Lost Communication with Automatic Lighting Control ModuleSeverity level 2 of 5: Not urgent.
U0181Lost Communication with Auto Park Brake ModuleSeverity level 5 of 5: Stop driving.
U0182Lost Communication with Headlamp Leveling Control ModuleSeverity level 2 of 5: Not urgent.
U0183Lost Communication with Sunroof Control ModuleSeverity level 2 of 5: Not urgent.
U0184Lost Communication with RadioSeverity level 2 of 5: Not urgent.
U0185Lost Communication with Antenna Control ModuleSeverity level 2 of 5: Not urgent.
U0186Lost Communication with Audio AmplifierSeverity level 2 of 5: Not urgent.
U0187Lost Communication with Disc Player ModuleSeverity level 2 of 5: Not urgent.
U0188Lost Communication with Audio Rear Control ModuleSeverity level 2 of 5: Not urgent.
U0189Lost Communication with Auxiliary Heater Control ModuleSeverity level 2 of 5: Not urgent.
U018ALost Communication With Headlamp Leveling Control Module BSeverity level 3 of 5: Diagnose soon.
U0190Lost Communication with Subwoofer Amplifier ModuleSeverity level 2 of 5: Not urgent.
U0191Lost Communication with Television Tuner ModuleSeverity level 2 of 5: Not urgent.
U0192Lost Communication with Personal ComputerSeverity level 2 of 5: Not urgent.
U0193Lost Communication with Mobile Phone ModuleSeverity level 2 of 5: Not urgent.
U0194Lost Communication with Personal Assist ModuleSeverity level 2 of 5: Not urgent.
U0195Lost Communication with Satellite Radio Receiver ModuleSeverity level 2 of 5: Not urgent.
U0196Lost Communication with Rear Seat Entertainment Control ModuleSeverity level 2 of 5: Not urgent.
U0197Lost Communication with Hands-Free Phone Control ModuleSeverity level 2 of 5: Not urgent.
U0198Lost Communication with Telematic Control ModuleSeverity level 2 of 5: Not urgent.
U0199Lost Communication with Door Control ModuleSeverity level 2 of 5: Not urgent.
U019ALost Communication With Tachograph ModuleSeverity level 3 of 5: Diagnose soon.
U019BLost Communication With Battery Charger Control Module ASeverity level 3 of 5: Diagnose soon.
U019CLost Communication With Glow Plug Control Module 2Severity level 3 of 5: Diagnose soon.
U019DLost Communication With Direct Ozone Reduction Catalyst Temperature SensorSeverity level 3 of 5: Diagnose soon.
U019ELost Communication With Transmission Range Control ModuleSeverity level 4 of 5: Get it looked at now.
U019FLost Communication With Engine Coolant Pump Control ModuleSeverity level 4 of 5: Get it looked at now.
U01A0Lost Communication With Hybrid/EV Battery Interface Control Module ASeverity level 4 of 5: Get it looked at now.
U01A1Lost Communication With Hybrid/EV Battery Interface Control Module BSeverity level 4 of 5: Get it looked at now.
U01A2Lost Communication With Hybrid/EV Battery Interface Control Module CSeverity level 4 of 5: Get it looked at now.
U01A3Lost Communication With Hybrid/EV Battery Interface Control Module DSeverity level 4 of 5: Get it looked at now.
U01A4Lost Communication With Hybrid/EV Battery Interface Control Module ESeverity level 4 of 5: Get it looked at now.
U01A5Lost Communication With Hybrid/EV Battery Interface Control Module FSeverity level 4 of 5: Get it looked at now.
U01A6Lost Communication With Hybrid/EV Battery Interface Control Module GSeverity level 4 of 5: Get it looked at now.
U01A7Lost Communication With Hybrid/EV Battery Interface Control Module HSeverity level 4 of 5: Get it looked at now.
U01A8Lost Communication With Hybrid/EV Battery Interface Control Module ISeverity level 4 of 5: Get it looked at now.
U01A9Lost Communication With Hybrid/EV Battery Interface Control Module JSeverity level 4 of 5: Get it looked at now.
U01AALost Communication With Hybrid/EV Battery Interface Control Module KSeverity level 4 of 5: Get it looked at now.
U01ABLost Communication With Hybrid/EV Battery Interface Control Module LSeverity level 4 of 5: Get it looked at now.
U01ACLost Communication With Hybrid/EV Battery Interface Control Module MSeverity level 4 of 5: Get it looked at now.
U01ADLost Communication With Hybrid/EV Battery Interface Control Module NSeverity level 4 of 5: Get it looked at now.
U01AELost Communication With Hybrid/EV Battery Interface Control Module OSeverity level 4 of 5: Get it looked at now.
U01AFLost Communication With Hybrid/EV Battery Interface Control Module PSeverity level 4 of 5: Get it looked at now.
U01B0Lost Communication With Battery Monitor ModuleSeverity level 3 of 5: Diagnose soon.
U01B1Lost Communication With Particulate Matter Sensor BSeverity level 3 of 5: Diagnose soon.
U01B2Lost Communication With Planetary Gear Set Control ModuleSeverity level 4 of 5: Get it looked at now.
U01B3Lost Communication With Brake Blending ActuatorSeverity level 5 of 5: Stop driving.
U01B4Lost Communication With Brake System Control Module BSeverity level 5 of 5: Stop driving.
U01B5Lost Communication With Catalyst Heater Control ModuleSeverity level 3 of 5: Diagnose soon.
U01B6Lost Communication With Fuel Heater Control ModuleSeverity level 3 of 5: Diagnose soon.
U01B7Lost Communication With Switch Input Module ASeverity level 3 of 5: Diagnose soon.
U01B8Lost Communication With Switch Input Module BSeverity level 3 of 5: Diagnose soon.
U01B9Lost Communication With Switch Input Module CSeverity level 3 of 5: Diagnose soon.
U01BALost Communication With Park Lock/Pawl Control ModuleSeverity level 4 of 5: Get it looked at now.
U01BBLost Communication With Battery Charger Control Module BSeverity level 3 of 5: Diagnose soon.
U01BCLost Communication With Charge Air Cooler Coolant Pump BSeverity level 3 of 5: Diagnose soon.
U01BDLost Communication With DC/DC Converter Control Module CSeverity level 4 of 5: Get it looked at now.
U01BELost Communication with Drive Motor A Clutch ActuatorSeverity level 4 of 5: Get it looked at now.
U01BFLost Communication with Battery Management Control ModuleSeverity level 4 of 5: Get it looked at now.