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
- 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
- U0901Invalid Data from Ion Sense Module
Code data: OBDex open dataset (CC0), reviewed and rewritten for drivers. Always confirm a diagnosis before replacing parts.