Check-engine codes
What does my check-engine code mean?
Plain-English explanations for OBD-II trouble codes: what the code means, the most likely causes, symptoms, and how much labour a repair usually takes.
U0 codes · Network
- 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
Code data: OBDex open dataset (CC0), reviewed and rewritten for drivers. Always confirm a diagnosis before replacing parts.