MANUFACTURER REFERENCE
Generic OBD-II code references — Page 91.
Read the source definition and confirm the exact vehicle, reporting module and diagnostic procedure.
Generic OBD-II
U0656
Lost Communication With Turbocharger/Supercharger Boost Control A Position Sensor
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Generic OBD-II
U0657
Lost Communication With Turbocharger/Supercharger Bypass Valve A Position Sensor
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Generic OBD-II
U0658
Lost Communication With Windshield Temperature Sensor
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Generic OBD-II
U0659
Lost Communication With Left Front Temperature Actuator
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Generic OBD-II
U065A
Lost Communication With Right Front Temperature Actuator
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Generic OBD-II
U065B
Lost Communication With Left Front Mode Actuator
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Generic OBD-II
U065C
Lost Communication With Right Front Mode Actuator
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Generic OBD-II
U065D
Lost Communication With Air Intake Actuator
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Generic OBD-II
U065E
Lost Communication With Ram Air Actuator
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Generic OBD-II
U065F
Lost Communication With Left Rear Temperature Actuator A
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Generic OBD-II
U0660
Lost Communication With Left Rear Temperature Actuator B
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Generic OBD-II
U0661
Lost Communication With Right Rear Temperature Actuator A
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Generic OBD-II
U0662
Lost Communication With Right Rear Temperature Actuator B
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Generic OBD-II
U0663
Lost Communication With Rear Mode Actuator
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Generic OBD-II
U0664
Lost Communication With Rear HVAC Air Cutoff Actuator
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Generic OBD-II
U0665
Lost Communication With Fuel Rail Pressure Sensor Bank 2
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Generic OBD-II
U0666
Lost Communication With Reductant Pressure Sensor
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Generic OBD-II
U0667
Lost Communication With Engine Oil Temperature Sensor A
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Generic OBD-II
U0668
Lost Communication With Engine Oil Level Sensor Circuit
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Generic OBD-II
U0669
Lost Communication With EGR Sensor D
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Generic OBD-II
U066A
Lost Communication With EGR Sensor E
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Generic OBD-II
U066B
Lost Communication With Turbocharger/Supercharger Bypass Valve B Position Sensor
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Generic OBD-II
U066C
Lost Communication With Exhaust Heat Exchanger Bypass Valve Actuator B
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Generic OBD-II
U066D
Lost Communication With Charge Air Cooler Temperature Sensor Bank 1
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Generic OBD-II
U066E
Lost Communication With Charge Air Cooler Temperature Sensor Bank 2
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Generic OBD-II
U066F
Lost Communication With Low Pressure Fuel System Sensor
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Generic OBD-II
U0670
Lost Communication With Fuel Temperature Sensor A
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Generic OBD-II
U0671
Lost Communication With Fuel Temperature Sensor B
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Generic OBD-II
U0672
Lost Communication With Engine Coolant Pump
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Generic OBD-II
U0673
Lost Communication With Ion Sense Module
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Generic OBD-II
U0674
Lost Communication With Wastegate Position Sensor B
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Generic OBD-II
U0675
Lost Communication With Turbocharger/Supercharger Speed Sensor A
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Generic OBD-II
U0676
Lost Communication With Fuel Level Sensor A
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Generic OBD-II
U0677
Lost Communication With Fuel Level Sensor B
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Generic OBD-II
U0678
Lost Communication With Fuel Level Sensor C
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Generic OBD-II
U0679
Lost Communication With Transmission Fluid Pressure Sensor/Switch A
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Generic OBD-II
U067A
Lost Communication With Transmission Fluid Pressure Sensor/Switch B
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Generic OBD-II
U067B
Lost Communication With Engine Disconnect Clutch Pressure Sensor
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Generic OBD-II
U067C
Lost Communication With Fan 3
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Generic OBD-II
U067D
Lost Communication With Fan 4
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Generic OBD-II
U067E
Lost Communication With Exhaust Pressure Control Valve B Sensor/Switch
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Generic OBD-II
U067F
Lost Communication With Barometric Pressure Sensor A
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Generic OBD-II
U0680
Lost Communication With Barometric Pressure Sensor B
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Generic OBD-II
U0681
Lost Communication With Throttle/Pedal Position Sensor/Switch D
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Generic OBD-II
U0682
Lost Communication With Throttle/Pedal Position Sensor/Switch E
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Generic OBD-II
U0683
Lost Communication With Throttle/Pedal Position Sensor/Switch F
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Generic OBD-II
U0684
Lost Communication With Catalyst Temperature Bank 1 Sensor 1
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Generic OBD-II
U0685
Lost Communication With Catalyst Temperature Bank 1 Sensor 2
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Generic OBD-II
U0686
Lost Communication With Catalyst Temperature Bank 2 Sensor 1
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Generic OBD-II
U0687
Lost Communication With Catalyst Temperature Bank 2 Sensor 2
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Generic OBD-II
U0688
Lost Communication With Throttle Position Sensor/Switch G
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Generic OBD-II
U0689
Lost Communication With Turbocharger/Supercharger B Temperature Sensor
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Generic OBD-II
U068A
Lost Communication With Barometric Pressure Sensor C
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Generic OBD-II
U068B
Lost Communication With Turbocharger/Supercharger Inlet Pressure Sensor A
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Generic OBD-II
U068C
Lost Communication With Turbocharger/Supercharger Inlet Pressure Sensor B
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Generic OBD-II
U068D
Lost Communication With EGR Temperature Sensor A
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Generic OBD-II
U068E
Lost Communication With EGR Temperature Sensor B
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Generic OBD-II
U068F
Lost Communication With EGR Temperature Sensor C
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Generic OBD-II
U0690
Lost Communication With EGR Temperature Sensor D
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Generic OBD-II
U0691
Lost Communication With Exhaust Pressure Sensor A
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Generic OBD-II
U0692
Lost Communication With Exhaust Pressure Sensor B
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Generic OBD-II
U0693
Lost Communication With Humidity Sensor
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Generic OBD-II
U0694
Lost Communication With Hybrid/EV Battery Pack Coolant Pump A
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Generic OBD-II
U0695
Lost Communication With Hybrid/EV Battery Pack Coolant Pump B
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Generic OBD-II
U0696
Lost Communication With Particulate Filter Pressure Sensor C
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Generic OBD-II
U0697
Lost Communication With Particulate Filter Pressure Sensor D
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Generic OBD-II
U0698
Lost Communication with Coolant Pump “E”
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Generic OBD-II
U0699
Lost Communication with Coolant Pump “F”
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Generic OBD-II
U069A
Lost Communication With Exhaust Gas Temperature Sensor Bank 1 Sensor 3
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Generic OBD-II
U069B
Lost Communication With Exhaust Gas Temperature Sensor Bank 1 Sensor 4
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Generic OBD-II
U069C
Lost Communication With Exhaust Gas Temperature Sensor Bank 2 Sensor 3
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Generic OBD-II
U069D
Lost Communication With Exhaust Gas Temperature Sensor Bank 2 Sensor 4
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Generic OBD-II
U069E
Lost Communication with Coolant Heater A
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Generic OBD-II
U069F
Lost Communication With Exhaust Pressure Sensor C
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Generic OBD-II
U0901
Invalid Data from Ion Sense Module
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Generic OBD-II
U3000
Control Module
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Generic OBD-II
U3001
Control Module Improper Shutdown Performance
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Generic OBD-II
U3002
Vehicle Identification Number
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Generic OBD-II
U3003
Battery Voltage
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Generic OBD-II
U3004
Accessory Power Relay
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Generic OBD-II
U3005
Retained Accessory Power
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Generic OBD-II
U3006
Control Module Input Power A Circuit/Open
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Generic OBD-II
U3007
Control Module Input Power B Circuit/Open
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Generic OBD-II
U3008
Control Module Ground A
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Generic OBD-II
U3009
Control Module Ground B
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Generic OBD-II
U300A
Ignition Switch
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Generic OBD-II
U300B
Ignition Input Accessory/On/Start
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Generic OBD-II
U300C
Ignition Input Off/On/Start
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Generic OBD-II
U300D
Ignition Input On/Start
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Generic OBD-II
U300E
Ignition Input On
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Generic OBD-II
U300F
Ignition Input Accessory
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Generic OBD-II
U3010
Ignition Input Start
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Generic OBD-II
U3011
Ignition Input Off
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Generic OBD-II
U3012
Control Module Improper Wake-up Performance
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Generic OBD-II
U3013
Control Module Input Power C Circuit/Open
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Generic OBD-II
U3014
Control Module Input Power D Circuit/Open
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Generic OBD-II
U3015
Control Module Ground C
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Generic OBD-II
U3016
Control Module Ground D
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Generic OBD-II
U3017
Control Module Timer/Clock Performance
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Generic OBD-II
U3018
Control Module Input Power Circuit A/B Correlation
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These are code references, not a list of confirmed faults on every vehicle. Read the source and applicability notes, then match the exact vehicle, year, engine and scan report.