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Fault codes U06xx: lost communication and control unit memory

Communication codes between control units. The cause is often a connector, a wire, a power supply or a weak battery: the control unit named is not necessarily faulty.

Official codes: 160, from smallest to largest. Tap a code to get a direct link to share.

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

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Official meanings: OBDex (public domain, CC0). Manufacturer codes: dtc-database (MIT license), probable meanings not verified by the manufacturers. The same meaning can vary depending on the model: always have a diagnosis confirmed by a professional.