U06xx codes: Network codes U0600-U0699
160 network trouble codes from U0600 to U069F. They mostly involve the vehicle bus wiring, sensor wiring, oil pressure sensor and DPF pressure sensor a.
All U06xx codes
135 of these codes usually turn on the check engine light; 74 can often be fixed at home.
| Code | Meaning | Difficulty |
|---|---|---|
| U0600 | Lost Communication With Engine Oil Pressure Sensor A | Medium |
| U0601 | Lost Communication With Particulate Filter Pressure Sensor A | Medium |
| U0602 | Lost Communication With Particulate Filter Pressure Sensor B | Medium |
| U0603 | Lost Communication With Fuel Pressure Sensor A | Medium |
| U0604 | Lost Communication With Fuel Pressure Sensor B | Medium |
| U0605 | Lost Communication With A/C Refrigerant Sensor A | Hard |
| U0606 | Lost Communication With Throttle/Pedal Position Sensor/Switch A | Medium |
| U0607 | Lost Communication With Throttle/Pedal Position Sensor/Switch B | Medium |
| U0608 | Lost Communication With Throttle/Pedal Position Sensor/Switch C | Medium |
| U0609 | Lost Communication With Manifold Absolute Pressure/Barometric Pressure Sensor | Medium |
| U060A | Lost Communication With Manifold Absolute Pressure Sensor B | Medium |
| U060B | Lost Communication With Turbocharger/Supercharger Boost Sensor A | Medium |
| U060C | Lost Communication With Turbocharger/Supercharger Boost Sensor B | Medium |
| U060D | Lost Communication With Turbocharger/Supercharger Boost Sensor C | Medium |
| U060E | Lost Communication With Crankcase Pressure Sensor | Medium |
| U060F | Lost Communication With Mass or Volume Air Flow Sensor A | Medium |
| U0610 | Lost Communication With Mass or Volume Air Flow Sensor B | Medium |
| U0611 | Lost Communication With Intake Air Temperature Sensor 1 Bank 1 | Easy |
| U0612 | Lost Communication With Intake Air Temperature Sensor 1 Bank 2 | Easy |
| U0613 | Lost Communication With Intake Air Temperature Sensor 2 Bank 1 | Medium |
| U0614 | Lost Communication With Intake Air Temperature Sensor 2 Bank 2 | Medium |
| U0615 | Lost Communication With Engine Coolant Bypass Valve A | Medium |
| U0616 | Lost Communication With Engine Coolant Bypass Valve B | Medium |
| U0617 | Lost Communication With Engine Coolant Bypass Valve C | Medium |
| U0618 | Lost Communication With Engine Coolant Bypass Valve D | Medium |
| U0619 | Lost Communication With Reductant Level Sensor A | Medium |
| U061A | Lost Communication With Reductant Level Sensor B | Medium |
| U061B | Lost Communication With Reductant Level Sensor C | Medium |
| U061C | Lost Communication With Reductant Temperature Sensor A | Medium |
| U061D | Lost Communication With Reductant Temperature Sensor B | Medium |
| U061E | Lost Communication With Battery Isolation/Voltage Stabilization Control Module | Medium |
| U061F | Lost Communication With Exhaust Gas Temperature Sensor Bank 1 Sensor 1 | Medium |
| U0620 | Lost Communication With Exhaust Gas Temperature Sensor Bank 1 Sensor 2 | Medium |
| U0621 | Lost Communication With Exhaust Gas Temperature Sensor Bank 2 Sensor 1 | Medium |
| U0622 | Lost Communication With Exhaust Gas Temperature Sensor Bank 2 Sensor 2 | Medium |
| U0623 | Lost Communication With Coolant Pump A | Medium |
| U0624 | Lost Communication With Coolant Pump B | Medium |
| U0625 | Lost Communication With Fuel Rail Pressure Sensor Bank 1 | Medium |
| U0626 | Lost Communication With A/C Refrigerant Pressure Sensor A | Medium |
| U0627 | Lost Communication With A/C Refrigerant Temperature Sensor A | Medium |
| U0628 | Lost Communication With A/C Refrigerant Pressure Sensor B | Medium |
| U0629 | Lost Communication With A/C Refrigerant Temperature Sensor B | Medium |
| U062A | Lost Communication With A/C Refrigerant Distribution Valve Actuator A | Hard |
| U062B | Lost Communication With A/C Refrigerant Distribution Valve Actuator B | Hard |
| U062C | Lost Communication With A/C Refrigerant Distribution Valve Actuator C | Hard |
| U062D | Lost Communication With A/C Refrigerant Distribution Valve Actuator D | Hard |
| U062E | Lost Communication With A/C Refrigerant Expansion Valve Actuator | Hard |
| U062F | Lost Communication With Coolant Pump C | Medium |
| U0630 | Lost Communication With Engine Coolant Temperature Sensor 4 | Medium |
| U0631 | Lost Communication With Engine Coolant Temperature Sensor 5 | Medium |
| U0632 | Lost Communication With Fan 1 | Medium |
| U0633 | Lost Communication With Fan 2 | Medium |
| U0634 | Lost Communication With Hybrid/EV Battery Pack Coolant Temperature Sensor A | Hard |
| U0635 | Lost Communication With Hybrid/EV Battery Pack Coolant Temperature Sensor B | Hard |
| U0636 | Lost Communication With Hybrid/EV Battery Pack Coolant Control Valve A | Hard |
| U0637 | Lost Communication With Hybrid/EV Battery Pack Coolant Control Valve B | Hard |
| U0638 | Lost Communication With Hybrid/EV Electronics Coolant Temperature Sensor A | Hard |
| U0639 | Lost Communication With Hybrid/EV Electronics Coolant Temperature Sensor B | Hard |
| U063A | Lost Communication With Hybrid/EV Electronics Coolant Temperature Sensor C | Hard |
| U063B | Lost Communication With Coolant Bypass Valve Actuator A | Medium |
| U063C | Lost Communication With Coolant Bypass Valve Actuator B | Medium |
| U063D | Lost Communication With Hybrid/EV Electronics Coolant Pump A | Medium |
| U063E | Lost Communication With Exhaust Heat Exchanger Bypass Valve Actuator A | Medium |
| U063F | Lost Communication With Engine Coolant Flow Control Valve Position Sensor | Medium |
| U0640 | Lost Communication With EVAP Fuel Vapor Temperature Sensor Circuit | Medium |
| U0641 | Lost Communication With EVAP System Pressure Sensor/Switch Circuit A | Medium |
| U0642 | Lost Communication With EVAP System Pressure Sensor/Switch Circuit B | Medium |
| U0643 | Lost Communication With Turbocharger/Supercharger A Temperature Sensor | Medium |
| U0644 | Lost Communication With Wastegate Position Sensor A | Medium |
| U0645 | Lost Communication With Active Air Dam Module | Medium |
| U0646 | Lost Communication With Motor Electronics Coolant Pump A | Medium |
| U0647 | Lost Communication With Motor Electronics Coolant Pump B | Medium |
| U0648 | Lost Communication With Motor Electronics Coolant Pump C | Medium |
| U0649 | Lost Communication With Coolant Pump D | Medium |
| U064A | Lost Communication With Hybrid/EV Battery Pack Current Sensor A | Workshop only |
| U064B | Lost Communication With Hybrid/EV Battery Pack Current Sensor B | Workshop only |
| U064C | Lost Communication With Hybrid/EV Battery Pack Current Sensor C | Workshop only |
| U064D | Lost Communication With Trailer Brake Control Switch | Medium |
| U064E | Lost Communication With EGR Cooler Bypass Position Sensor Bank 1 | Medium |
| U064F | Lost Communication With Intake Manifold Runner Position Sensor Bank 1 | Medium |
| U0650 | Lost Communication With Exhaust Pressure Control Valve A Sensor/Switch | Medium |
| U0651 | Lost Communication With EGR Sensor A | Medium |
| U0652 | Lost Communication With EGR Sensor B | Medium |
| U0653 | Lost Communication With EGR Sensor C | Medium |
| U0654 | Lost Communication With Diesel Intake Air Flow A Position Sensor | Medium |
| U0655 | Lost Communication With Diesel Intake Air Flow B Position Sensor | Medium |
| U0656 | Lost Communication With Turbocharger/Supercharger Boost Control A Position Sensor | Hard |
| U0657 | Lost Communication With Turbocharger/Supercharger Bypass Valve A Position Sensor | Medium |
| U0658 | Lost Communication With Windshield Temperature Sensor | Easy |
| U0659 | Lost Communication With Left Front Temperature Actuator | Medium |
| U065A | Lost Communication With Right Front Temperature Actuator | Medium |
| U065B | Lost Communication With Left Front Mode Actuator | Medium |
| U065C | Lost Communication With Right Front Mode Actuator | Medium |
| U065D | Lost Communication With Air Intake Actuator | Medium |
| U065E | Lost Communication With Ram Air Actuator | Medium |
| U065F | Lost Communication With Left Rear Temperature Actuator A | Hard |
| U0660 | Lost Communication With Left Rear Temperature Actuator B | Hard |
| U0661 | Lost Communication With Right Rear Temperature Actuator A | Hard |
| U0662 | Lost Communication With Right Rear Temperature Actuator B | Hard |
| U0663 | Lost Communication With Rear Mode Actuator | Hard |
| U0664 | Lost Communication With Rear HVAC Air Cutoff Actuator | Hard |
| U0665 | Lost Communication With Fuel Rail Pressure Sensor Bank 2 | Medium |
| U0666 | Lost Communication With Reductant Pressure Sensor | Medium |
| U0667 | Lost Communication With Engine Oil Temperature Sensor A | Easy |
| U0668 | Lost Communication With Engine Oil Level Sensor Circuit | Easy |
| U0669 | Lost Communication With EGR Sensor D | Medium |
| U066A | Lost Communication With EGR Sensor E | Medium |
| U066B | Lost Communication With Turbocharger/Supercharger Bypass Valve B Position Sensor | Medium |
| U066C | Lost Communication With Exhaust Heat Exchanger Bypass Valve Actuator B | Medium |
| U066D | Lost Communication With Charge Air Cooler Temperature Sensor Bank 1 | Easy |
| U066E | Lost Communication With Charge Air Cooler Temperature Sensor Bank 2 | Easy |
| U066F | Lost Communication With Low Pressure Fuel System Sensor | Medium |
| U0670 | Lost Communication With Fuel Temperature Sensor A | Medium |
| U0671 | Lost Communication With Fuel Temperature Sensor B | Medium |
| U0672 | Lost Communication With Engine Coolant Pump | Medium |
| U0673 | Lost Communication With Ion Sense Module | Easy |
| U0674 | Lost Communication With Wastegate Position Sensor B | Medium |
| U0675 | Lost Communication With Turbocharger/Supercharger Speed Sensor A | Medium |
| U0676 | Lost Communication With Fuel Level Sensor A | Medium |
| U0677 | Lost Communication With Fuel Level Sensor B | Medium |
| U0678 | Lost Communication With Fuel Level Sensor C | Medium |
| U0679 | Lost Communication With Transmission Fluid Pressure Sensor/Switch A | Hard |
| U067A | Lost Communication With Transmission Fluid Pressure Sensor/Switch B | Hard |
| U067B | Lost Communication With Engine Disconnect Clutch Pressure Sensor | Hard |
| U067C | Lost Communication With Fan 3 | Medium |
| U067D | Lost Communication With Fan 4 | Medium |
| U067E | Lost Communication With Exhaust Pressure Control Valve B Sensor/Switch | Medium |
| U067F | Lost Communication With Barometric Pressure Sensor A | Easy |
| U0680 | Lost Communication With Barometric Pressure Sensor B | Medium |
| U0681 | Lost Communication With Throttle/Pedal Position Sensor/Switch D | Easy |
| U0682 | Lost Communication With Throttle/Pedal Position Sensor/Switch E | Easy |
| U0683 | Lost Communication With Throttle/Pedal Position Sensor/Switch F | Medium |
| U0684 | Lost Communication With Catalyst Temperature Bank 1 Sensor 1 | Medium |
| U0685 | Lost Communication With Catalyst Temperature Bank 1 Sensor 2 | Medium |
| U0686 | Lost Communication With Catalyst Temperature Bank 2 Sensor 1 | Medium |
| U0687 | Lost Communication With Catalyst Temperature Bank 2 Sensor 2 | Medium |
| U0688 | Lost Communication With Throttle Position Sensor/Switch G | Medium |
| U0689 | Lost Communication With Turbocharger/Supercharger B Temperature Sensor | Medium |
| U068A | Lost Communication With Barometric Pressure Sensor C | Medium |
| U068B | Lost Communication With Turbocharger/Supercharger Inlet Pressure Sensor A | Easy |
| U068C | Lost Communication With Turbocharger/Supercharger Inlet Pressure Sensor B | Easy |
| U068D | Lost Communication With EGR Temperature Sensor A | Medium |
| U068E | Lost Communication With EGR Temperature Sensor B | Medium |
| U068F | Lost Communication With EGR Temperature Sensor C | Medium |
| U0690 | Lost Communication With EGR Temperature Sensor D | Medium |
| U0691 | Lost Communication With Exhaust Pressure Sensor A | Medium |
| U0692 | Lost Communication With Exhaust Pressure Sensor B | Medium |
| U0693 | Lost Communication With Humidity Sensor | Easy |
| U0694 | Lost Communication With Hybrid/EV Battery Pack Coolant Pump A | Hard |
| U0695 | Lost Communication With Hybrid/EV Battery Pack Coolant Pump B | Hard |
| U0696 | Lost Communication With Particulate Filter Pressure Sensor C | Medium |
| U0697 | Lost Communication With Particulate Filter Pressure Sensor D | Medium |
| U0698 | Lost Communication With Coolant Pump E | Medium |
| U0699 | Lost Communication With Coolant Pump F | Medium |
| U069A | Lost Communication With Exhaust Gas Temperature Sensor Bank 1 Sensor 3 | Medium |
| U069B | Lost Communication With Exhaust Gas Temperature Sensor Bank 1 Sensor 4 | Medium |
| U069C | Lost Communication With Exhaust Gas Temperature Sensor Bank 2 Sensor 3 | Medium |
| U069D | Lost Communication With Exhaust Gas Temperature Sensor Bank 2 Sensor 4 | Medium |
| U069E | Lost Communication With Coolant Heater A | Medium |
| U069F | Lost Communication With Exhaust Pressure Sensor C | Medium |