U06xx

160 generic network & communication codes in the U06xx 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

U0600Internal Control Module Memory ResetSeverity level 3 of 5: Diagnose soon.
U0601Internal Control Module Software IncompatibilitySeverity level 3 of 5: Diagnose soon.
U0602Lost Communication With Particulate Filter Pressure Sensor BSeverity level 3 of 5: Diagnose soon.
U0603Lost Communication With Fuel Pressure Sensor ASeverity level 4 of 5: Get it looked at now.
U0604Lost Communication With Fuel Pressure Sensor BSeverity level 4 of 5: Get it looked at now.
U0605Lost Communication With A/C Refrigerant Sensor ASeverity level 2 of 5: Not urgent.
U0606Lost Communication With Throttle/Pedal Position Sensor/Switch ASeverity level 4 of 5: Get it looked at now.
U0607Lost Communication With Throttle/Pedal Position Sensor/Switch BSeverity level 4 of 5: Get it looked at now.
U0608Lost Communication With Throttle/Pedal Position Sensor/Switch CSeverity level 4 of 5: Get it looked at now.
U0609Lost Communication With Manifold Absolute Pressure/Barometric Pressure SensorSeverity level 3 of 5: Diagnose soon.
U060ALost Communication With Manifold Absolute Pressure Sensor BSeverity level 3 of 5: Diagnose soon.
U060BLost Communication With Turbocharger/Supercharger Boost Sensor ASeverity level 4 of 5: Get it looked at now.
U060CLost Communication With Turbocharger/Supercharger Boost Sensor BSeverity level 4 of 5: Get it looked at now.
U060DLost Communication With Turbocharger/Supercharger Boost Sensor CSeverity level 4 of 5: Get it looked at now.
U060ELost Communication With Crankcase Pressure SensorSeverity level 3 of 5: Diagnose soon.
U060FLost Communication With Mass or Volume Air Flow Sensor ASeverity level 4 of 5: Get it looked at now.
U0610Lost Communication With Mass or Volume Air Flow Sensor BSeverity level 4 of 5: Get it looked at now.
U0611Lost Communication With Intake Air Temperature Sensor 1 Bank 1Severity level 3 of 5: Diagnose soon.
U0612Lost Communication With Intake Air Temperature Sensor 1 Bank 2Severity level 3 of 5: Diagnose soon.
U0613Lost Communication With Intake Air Temperature Sensor 2 Bank 1Severity level 3 of 5: Diagnose soon.
U0614Lost Communication With Intake Air Temperature Sensor 2 Bank 2Severity level 3 of 5: Diagnose soon.
U0615Lost Communication With Engine Coolant Bypass Valve ASeverity level 3 of 5: Diagnose soon.
U0616Lost Communication With Engine Coolant Bypass Valve BSeverity level 3 of 5: Diagnose soon.
U0617Lost Communication With Engine Coolant Bypass Valve CSeverity level 3 of 5: Diagnose soon.
U0618Lost Communication With Engine Coolant Bypass Valve DSeverity level 3 of 5: Diagnose soon.
U0619Lost Communication With Reductant Level Sensor ASeverity level 3 of 5: Diagnose soon.
U061ALost Communication With Reductant Level Sensor BSeverity level 3 of 5: Diagnose soon.
U061BLost Communication With Reductant Level Sensor CSeverity level 3 of 5: Diagnose soon.
U061CLost Communication With Reductant Temperature Sensor ASeverity level 3 of 5: Diagnose soon.
U061DLost Communication With Reductant Temperature Sensor BSeverity level 3 of 5: Diagnose soon.
U061ELost Communication With Battery Isolation/Voltage Stabilization Control ModuleSeverity level 5 of 5: Stop driving.
U061FLost Communication With Exhaust Gas Temperature Sensor Bank 1 Sensor 1Severity level 3 of 5: Diagnose soon.
U0620Lost Communication With Exhaust Gas Temperature Sensor Bank 1 Sensor 2Severity level 3 of 5: Diagnose soon.
U0621Lost Communication With Exhaust Gas Temperature Sensor Bank 2 Sensor 1Severity level 3 of 5: Diagnose soon.
U0622Lost Communication With Exhaust Gas Temperature Sensor Bank 2 Sensor 2Severity level 3 of 5: Diagnose soon.
U0623Lost Communication With Coolant Pump ASeverity level 4 of 5: Get it looked at now.
U0624Lost Communication With Coolant Pump BSeverity level 4 of 5: Get it looked at now.
U0625Lost Communication With Fuel Rail Pressure Sensor Bank 1Severity level 4 of 5: Get it looked at now.
U0626Lost Communication With A/C Refrigerant Pressure Sensor ASeverity level 2 of 5: Not urgent.
U0627Lost Communication With A/C Refrigerant Temperature Sensor ASeverity level 2 of 5: Not urgent.
U0628Lost Communication With A/C Refrigerant Pressure Sensor BSeverity level 2 of 5: Not urgent.
U0629Lost Communication With A/C Refrigerant Temperature Sensor BSeverity level 2 of 5: Not urgent.
U062ALost Communication With A/C Refrigerant Distribution Valve Actuator ASeverity level 2 of 5: Not urgent.
U062BLost Communication With A/C Refrigerant Distribution Valve Actuator BSeverity level 2 of 5: Not urgent.
U062CLost Communication With A/C Refrigerant Distribution Valve Actuator CSeverity level 2 of 5: Not urgent.
U062DLost Communication With A/C Refrigerant Distribution Valve Actuator DSeverity level 2 of 5: Not urgent.
U062ELost Communication With A/C Refrigerant Expansion Valve ActuatorSeverity level 2 of 5: Not urgent.
U062FLost Communication With Coolant Pump CSeverity level 4 of 5: Get it looked at now.
U0630Lost Communication With Engine Coolant Temperature Sensor 4Severity level 3 of 5: Diagnose soon.
U0631Lost Communication With Engine Coolant Temperature Sensor 5Severity level 3 of 5: Diagnose soon.
U0632Lost Communication With Fan 1Severity level 4 of 5: Get it looked at now.
U0633Lost Communication With Fan 2Severity level 4 of 5: Get it looked at now.
U0634Lost Communication With Hybrid/EV Battery Pack Coolant Temperature Sensor ASeverity level 4 of 5: Get it looked at now.
U0635Lost Communication With Hybrid/EV Battery Pack Coolant Temperature Sensor BSeverity level 4 of 5: Get it looked at now.
U0636Lost Communication With Hybrid/EV Battery Pack Coolant Control Valve ASeverity level 4 of 5: Get it looked at now.
U0637Lost Communication With Hybrid/EV Battery Pack Coolant Control Valve BSeverity level 4 of 5: Get it looked at now.
U0638Lost Communication With Hybrid/EV Electronics Coolant Temperature Sensor ASeverity level 4 of 5: Get it looked at now.
U0639Lost Communication With Hybrid/EV Electronics Coolant Temperature Sensor BSeverity level 4 of 5: Get it looked at now.
U063ALost Communication With Hybrid/EV Electronics Coolant Temperature Sensor CSeverity level 4 of 5: Get it looked at now.
U063BLost Communication With Coolant Bypass Valve Actuator ASeverity level 3 of 5: Diagnose soon.
U063CLost Communication With Coolant Bypass Valve Actuator BSeverity level 3 of 5: Diagnose soon.
U063DLost Communication With Hybrid/EV Electronics Coolant Pump ASeverity level 4 of 5: Get it looked at now.
U063ELost Communication With Exhaust Heat Exchanger Bypass Valve Actuator ASeverity level 3 of 5: Diagnose soon.
U063FLost Communication With Engine Coolant Flow Control Valve Position SensorSeverity level 3 of 5: Diagnose soon.
U0640Lost Communication With EVAP Fuel Vapor Temperature Sensor CircuitSeverity level 3 of 5: Diagnose soon.
U0641Lost Communication With EVAP System Pressure Sensor/Switch Circuit ASeverity level 3 of 5: Diagnose soon.
U0642Lost Communication With EVAP System Pressure Sensor/Switch Circuit BSeverity level 3 of 5: Diagnose soon.
U0643Lost Communication With Turbocharger/Supercharger A Temperature SensorSeverity level 3 of 5: Diagnose soon.
U0644Lost Communication With Wastegate Position Sensor ASeverity level 4 of 5: Get it looked at now.
U0645Lost Communication With Active Air Dam ModuleSeverity level 2 of 5: Not urgent.
U0646Lost Communication With Motor Electronics Coolant Pump ASeverity level 4 of 5: Get it looked at now.
U0647Lost Communication With Motor Electronics Coolant Pump BSeverity level 4 of 5: Get it looked at now.
U0648Lost Communication With Motor Electronics Coolant Pump CSeverity level 4 of 5: Get it looked at now.
U0649Lost Communication With Coolant Pump DSeverity level 4 of 5: Get it looked at now.
U064ALost Communication With Hybrid/EV Battery Pack Current Sensor ASeverity level 4 of 5: Get it looked at now.
U064BLost Communication With Hybrid/EV Battery Pack Current Sensor BSeverity level 4 of 5: Get it looked at now.
U064CLost Communication With Hybrid/EV Battery Pack Current Sensor CSeverity level 4 of 5: Get it looked at now.
U064DLost Communication With Trailer Brake Control SwitchSeverity level 5 of 5: Stop driving.
U064ELost Communication With EGR Cooler Bypass Position Sensor Bank 1Severity level 3 of 5: Diagnose soon.
U064FLost Communication With Intake Manifold Runner Position Sensor Bank 1Severity level 3 of 5: Diagnose soon.
U0650Lost Communication With Exhaust Pressure Control Valve A Sensor/SwitchSeverity level 3 of 5: Diagnose soon.
U0651Lost Communication With EGR Sensor ASeverity level 3 of 5: Diagnose soon.
U0652Lost Communication With EGR Sensor BSeverity level 3 of 5: Diagnose soon.
U0653Lost Communication With EGR Sensor CSeverity level 3 of 5: Diagnose soon.
U0654Lost Communication With Diesel Intake Air Flow A Position SensorSeverity level 3 of 5: Diagnose soon.
U0655Lost Communication With Diesel Intake Air Flow B Position SensorSeverity level 3 of 5: Diagnose soon.
U0656Lost Communication With Turbocharger/Supercharger Boost Control A Position SensorSeverity level 4 of 5: Get it looked at now.
U0657Lost Communication With Turbocharger/Supercharger Bypass Valve A Position SensorSeverity level 3 of 5: Diagnose soon.
U0658Lost Communication With Windshield Temperature SensorSeverity level 2 of 5: Not urgent.
U0659Lost Communication With Left Front Temperature ActuatorSeverity level 2 of 5: Not urgent.
U065ALost Communication With Right Front Temperature ActuatorSeverity level 2 of 5: Not urgent.
U065BLost Communication With Left Front Mode ActuatorSeverity level 2 of 5: Not urgent.
U065CLost Communication With Right Front Mode ActuatorSeverity level 2 of 5: Not urgent.
U065DLost Communication With Air Intake ActuatorSeverity level 2 of 5: Not urgent.
U065ELost Communication With Ram Air ActuatorSeverity level 2 of 5: Not urgent.
U065FLost Communication With Left Rear Temperature Actuator ASeverity level 2 of 5: Not urgent.
U0660Lost Communication With Left Rear Temperature Actuator BSeverity level 2 of 5: Not urgent.
U0661Lost Communication With Right Rear Temperature Actuator ASeverity level 2 of 5: Not urgent.
U0662Lost Communication With Right Rear Temperature Actuator BSeverity level 2 of 5: Not urgent.
U0663Lost Communication With Rear Mode ActuatorSeverity level 2 of 5: Not urgent.
U0664Lost Communication With Rear HVAC Air Cutoff ActuatorSeverity level 2 of 5: Not urgent.
U0665Lost Communication With Fuel Rail Pressure Sensor Bank 2Severity level 4 of 5: Get it looked at now.
U0666Lost Communication With Reductant Pressure SensorSeverity level 3 of 5: Diagnose soon.
U0667Lost Communication With Engine Oil Temperature Sensor ASeverity level 3 of 5: Diagnose soon.
U0668Lost Communication With Engine Oil Level Sensor CircuitSeverity level 3 of 5: Diagnose soon.
U0669Lost Communication With EGR Sensor DSeverity level 3 of 5: Diagnose soon.
U066ALost Communication With EGR Sensor ESeverity level 3 of 5: Diagnose soon.
U066BLost Communication With Turbocharger/Supercharger Bypass Valve B Position SensorSeverity level 3 of 5: Diagnose soon.
U066CLost Communication With Exhaust Heat Exchanger Bypass Valve Actuator BSeverity level 3 of 5: Diagnose soon.
U066DLost Communication With Charge Air Cooler Temperature Sensor Bank 1Severity level 3 of 5: Diagnose soon.
U066ELost Communication With Charge Air Cooler Temperature Sensor Bank 2Severity level 3 of 5: Diagnose soon.
U066FLost Communication With Low Pressure Fuel System SensorSeverity level 4 of 5: Get it looked at now.
U0670Lost Communication With Fuel Temperature Sensor ASeverity level 3 of 5: Diagnose soon.
U0671Lost Communication With Fuel Temperature Sensor BSeverity level 3 of 5: Diagnose soon.
U0672Lost Communication With Engine Coolant PumpSeverity level 4 of 5: Get it looked at now.
U0673Lost Communication With Ion Sense ModuleSeverity level 3 of 5: Diagnose soon.
U0674Lost Communication With Wastegate Position Sensor BSeverity level 4 of 5: Get it looked at now.
U0675Lost Communication With Turbocharger/Supercharger Speed Sensor ASeverity level 4 of 5: Get it looked at now.
U0676Lost Communication With Fuel Level Sensor ASeverity level 3 of 5: Diagnose soon.
U0677Lost Communication With Fuel Level Sensor BSeverity level 3 of 5: Diagnose soon.
U0678Lost Communication With Fuel Level Sensor CSeverity level 3 of 5: Diagnose soon.
U0679Lost Communication With Transmission Fluid Pressure Sensor/Switch ASeverity level 4 of 5: Get it looked at now.
U067ALost Communication With Transmission Fluid Pressure Sensor/Switch BSeverity level 4 of 5: Get it looked at now.
U067BLost Communication With Engine Disconnect Clutch Pressure SensorSeverity level 4 of 5: Get it looked at now.
U067CLost Communication With Fan 3Severity level 4 of 5: Get it looked at now.
U067DLost Communication With Fan 4Severity level 4 of 5: Get it looked at now.
U067ELost Communication With Exhaust Pressure Control Valve B Sensor/SwitchSeverity level 3 of 5: Diagnose soon.
U067FLost Communication With Barometric Pressure Sensor ASeverity level 3 of 5: Diagnose soon.
U0680Lost Communication With Barometric Pressure Sensor BSeverity level 3 of 5: Diagnose soon.
U0681Lost Communication With Throttle/Pedal Position Sensor/Switch DSeverity level 4 of 5: Get it looked at now.
U0682Lost Communication With Throttle/Pedal Position Sensor/Switch ESeverity level 4 of 5: Get it looked at now.
U0683Lost Communication With Throttle/Pedal Position Sensor/Switch FSeverity level 4 of 5: Get it looked at now.
U0684Lost Communication With Catalyst Temperature Bank 1 Sensor 1Severity level 3 of 5: Diagnose soon.
U0685Lost Communication With Catalyst Temperature Bank 1 Sensor 2Severity level 3 of 5: Diagnose soon.
U0686Lost Communication With Catalyst Temperature Bank 2 Sensor 1Severity level 3 of 5: Diagnose soon.
U0687Lost Communication With Catalyst Temperature Bank 2 Sensor 2Severity level 3 of 5: Diagnose soon.
U0688Lost Communication With Throttle Position Sensor/Switch GSeverity level 4 of 5: Get it looked at now.
U0689Lost Communication With Turbocharger/Supercharger B Temperature SensorSeverity level 3 of 5: Diagnose soon.
U068ALost Communication With Barometric Pressure Sensor CSeverity level 3 of 5: Diagnose soon.
U068BLost Communication With Turbocharger/Supercharger Inlet Pressure Sensor ASeverity level 3 of 5: Diagnose soon.
U068CLost Communication With Turbocharger/Supercharger Inlet Pressure Sensor BSeverity level 3 of 5: Diagnose soon.
U068DLost Communication With EGR Temperature Sensor ASeverity level 3 of 5: Diagnose soon.
U068ELost Communication With EGR Temperature Sensor BSeverity level 3 of 5: Diagnose soon.
U068FLost Communication With EGR Temperature Sensor CSeverity level 3 of 5: Diagnose soon.
U0690Lost Communication With EGR Temperature Sensor DSeverity level 3 of 5: Diagnose soon.
U0691Lost Communication With Exhaust Pressure Sensor ASeverity level 3 of 5: Diagnose soon.
U0692Lost Communication With Exhaust Pressure Sensor BSeverity level 3 of 5: Diagnose soon.
U0693Lost Communication With Humidity SensorSeverity level 3 of 5: Diagnose soon.
U0694Lost Communication With Hybrid/EV Battery Pack Coolant Pump ASeverity level 4 of 5: Get it looked at now.
U0695Lost Communication With Hybrid/EV Battery Pack Coolant Pump BSeverity level 4 of 5: Get it looked at now.
U0696Lost Communication With Particulate Filter Pressure Sensor CSeverity level 3 of 5: Diagnose soon.
U0697Lost Communication With Particulate Filter Pressure Sensor DSeverity level 3 of 5: Diagnose soon.
U0698Lost Communication With Coolant Pump ESeverity level 4 of 5: Get it looked at now.
U0699Lost Communication With Coolant Pump FSeverity level 4 of 5: Get it looked at now.
U069ALost Communication With Exhaust Gas Temperature Sensor Bank 1 Sensor 3Severity level 3 of 5: Diagnose soon.
U069BLost Communication With Exhaust Gas Temperature Sensor Bank 1 Sensor 4Severity level 3 of 5: Diagnose soon.
U069CLost Communication With Exhaust Gas Temperature Sensor Bank 2 Sensor 3Severity level 3 of 5: Diagnose soon.
U069DLost Communication With Exhaust Gas Temperature Sensor Bank 2 Sensor 4Severity level 3 of 5: Diagnose soon.
U069ELost Communication With Coolant Heater ASeverity level 3 of 5: Diagnose soon.
U069FLost Communication With Exhaust Pressure Sensor CSeverity level 3 of 5: Diagnose soon.