Network · U codes · 170 codes
Control module power & shutdown
Module supply voltage, ignition inputs, improper shutdown and module cooling.
Codes in this group
170
Generic SAE codes · OBDex
Rated urgent
53%
90 codes · our rating
DIY-friendly
37%
63 codes · per OBDex
Typical labor
$125–$500
Median hours × $125/hr · est.
01 —Full list
All 170 codes
Grouped by the first three characters of the code.
U30xx
52 codes
- U3000Control Module
- U3001Control Module Improper Shutdown Performance
- U3002Vehicle Identification Number
- U3003Battery Voltage
- U3004Accessory Power Relay
- U3005Retained Accessory Power
- U3006Control Module Input Power A Circuit/Open
- U3007Control Module Input Power B Circuit/Open
- U3008Control Module Ground A
- U3009Control Module Ground B
- U300AIgnition Switch
- U300BIgnition Input Accessory/On/Start
- U300CIgnition Input Off/On/Start
- U300DIgnition Input On/Start
- U300EIgnition Input On
- U300FIgnition Input Accessory
- U3010Ignition Input Start
- U3011Ignition Input Off
- U3012Control Module Improper Wake-up Performance
- U3013Control Module Input Power C Circuit/Open
- U3014Control Module Input Power D Circuit/Open
- U3015Control Module Ground C
- U3016Control Module Ground D
- U3017Control Module Timer/Clock Performance
- U3018Control Module Input Power Circuit A/B Correlation
- U3019Control Module Input Power Circuit B/C Correlation
- U301AControl Module Wake-up Circuit A/Open
- U301BControl Module Wake-up Circuit A Low
- U301CControl Module Wake-up Circuit A High
- U301DControl Module Wake-up Circuit A Performance
- U301EControl Module Wake-up Circuit B/Open
- U301FControl Module Wake-up Circuit B Low
- U3020Control Module Wake-up Circuit B High
- U3021Control Module Wake-up Circuit B Performance
- U3022Ignition Input Accessory/Off
- U3023Control Module Input Power Circuit A - Ignition Input On/Start Circuit Correlation
- U3024Control Module Input Power Circuit B - Ignition Input On/Start Circuit Correlation
- U3025Control Module A Disable Circuit/Open
- U3026Control Module A Disable Circuit Low
- U3027Control Module A Disable Circuit High
- U3028Control Module A Disable Feedback Circuit
- U3029Control Module A Disable Feedback Circuit Low
- U302AControl Module A Disable Feedback Circuit High
- U302BIgnition Output Accessory/On/Start
- U302CIgnition Output Off/On/Start
- U302DIgnition Output On/Start
- U302EIgnition Output On
- U302FIgnition Output Accessory
- U3030Ignition Output Start
- U3031Ignition Output Off
- U3032Ignition Output Accessory/Off
- U3033Control Module Security Certificate Missing/Invalid
U35xx
118 codes
- U3500Control Module Input Power A Circuit Range/Performance
- U3501Control Module Input Power A Circuit Low
- U3502Control Module Input Power A Circuit High
- U3503Control Module Input Power A Circuit Intermittent/Erratic
- U3504Control Module Input Power B Circuit Range/Performance
- U3505Control Module Input Power B Circuit Low
- U3506Control Module Input Power B Circuit High
- U3507Control Module Input Power B Circuit Intermittent/Erratic
- U3508Control Module Input Power C Circuit Range/Performance
- U3509Control Module Input Power C Circuit Low
- U350AControl Module Input Power C Circuit High
- U350BControl Module Input Power C Circuit Intermittent/Erratic
- U350CControl Module Cooling Fan Circuit/Open
- U350DControl Module Cooling Fan Circuit Low
- U350EControl Module Cooling Fan Circuit High
- U350FControl Module Cooling Fan Circuit Range/Performance
- U3511High Voltage System Interlock Circuit B
- U3512High Voltage System Interlock Circuit B Performance
- U3513High Voltage System Interlock Circuit B Low
- U3514High Voltage System Interlock Circuit B High
- U3515High Voltage System Interlock Circuit C
- U3516High Voltage System Interlock Circuit C Performance
- U3517High Voltage System Interlock Circuit C Low
- U3518High Voltage System Interlock Circuit C High
- U3519High Voltage System Interlock Circuit D
- U351AHigh Voltage System Interlock Circuit D Performance
- U351BHigh Voltage System Interlock Circuit D Low
- U351CHigh Voltage System Interlock Circuit D High
- U351DHigh Voltage System Interlock Circuit E
- U351EHigh Voltage System Interlock Circuit E Performance
- U351FHigh Voltage System Interlock Circuit E Low
- U3520High Voltage System Interlock Circuit E High
- U3521High Voltage System Interlock Circuit F
- U3522High Voltage System Interlock Circuit F Performance
- U3523High Voltage System Interlock Circuit F Low
- U3524High Voltage System Interlock Circuit F High
- U3525High Voltage System Interlock Circuit G
- U3526High Voltage System Interlock Circuit G Performance
- U3527High Voltage System Interlock Circuit G Low
- U3528High Voltage System Interlock Circuit G High
- U3529High Voltage System Interlock Circuit H
- U352AHigh Voltage System Interlock Circuit H Performance
- U352BHigh Voltage System Interlock Circuit H Low
- U352CHigh Voltage System Interlock Circuit H High
- U352DHigh Voltage System Interlock Circuit J
- U352EHigh Voltage System Interlock Circuit J Performance
- U352FHigh Voltage System Interlock Circuit J Low
- U3530High Voltage System Interlock Circuit J High
- U3531High Voltage System Interlock Circuit K
- U3532High Voltage System Interlock Circuit K Performance
- U3533High Voltage System Interlock Circuit K Low
- U3534High Voltage System Interlock Circuit K High
- U3535High Voltage System Interlock Circuit L
- U3536High Voltage System Interlock Circuit L Performance
- U3537High Voltage System Interlock Circuit L Low
- U3538High Voltage System Interlock Circuit L High
- U3539High Voltage System Interlock Circuit M
- U353AHigh Voltage System Interlock Circuit M Performance
- U353BHigh Voltage System Interlock Circuit M Low
- U353CHigh Voltage System Interlock Circuit M High
- U353DHigh Voltage System Interlock Circuit N
- U353EHigh Voltage System Interlock Circuit N Performance
- U353FHigh Voltage System Interlock Circuit N Low
- U3540High Voltage System Interlock Circuit N High
- U3541High Voltage System Interlock Circuit O
- U3542High Voltage System Interlock Circuit O Performance
- U3543High Voltage System Interlock Circuit O Low
- U3544High Voltage System Interlock Circuit O High
- U3545High Voltage System Interlock Circuit P
- U3546High Voltage System Interlock Circuit P Performance
- U3547High Voltage System Interlock Circuit P Low
- U3548High Voltage System Interlock Circuit P High
- U3549Hydrogen Tank High Pressure Sensor 1 Circuit
- U354AHydrogen Tank A Temperature Sensor 1 Circuit
- U354BHydrogen Tank A Temperature Sensor 2 Circuit
- U354CHydrogen Tank B Temperature Sensor 1 Circuit
- U354DHydrogen Tank B Temperature Sensor 2 Circuit
- U354EHydrogen Tank C Temperature Sensor 1 Circuit
- U354FHydrogen Tank C Temperature Sensor 2 Circuit
- U3550Hydrogen Tank A Valve Control Circuit
- U3551Hydrogen Tank A Valve Enable Circuit
- U3552Hydrogen Tank A Valve Performance
- U3553Hydrogen Tank B Valve Control Circuit
- U3554Hydrogen Tank B Valve Enable Circuit
- U3555Hydrogen Tank B Valve Performance
- U3556Hydrogen Tank C Valve Control Circuit
- U3557Hydrogen Tank C Valve Enable Circuit
- U3558Hydrogen Tank C Valve
- U3559Air Inlet Pressure Sensor Circuit
- U355ACharge Air Cooler Outlet Pressure Sensor 1 Circuit
- U355BCharge Air Cooler Outlet Pressure Sensor 2 Circuit
- U355CCharge Air Cooler Outlet Temperature Sensor Circuit
- U355DExpander Inlet Pressure Sensor 1 Circuit
- U355EExpander Inlet Pressure Sensor 2 Circuit
- U355FCathode Backpressure Valve Control Circuit
- U3560Cathode Backpressure Valve Position Sensor Circuit
- U3561Cathode Bypass Valve Control Circuit
- U3562Cathode Bypass Valve
- U3563Cathode Bypass Valve Position Sensor Circuit
- U3564Hydrogen Supply Line A Pressure Sensor 1 Circuit
- U3565Hydrogen Supply Line A Pressure Sensor 2 Circuit
- U3566Anode Inlet Pressure Sensor 1 Circuit
- U3567Anode Inlet Pressure Sensor 2 Circuit
- U3568Anode Multifunction Valve Control Circuit
- U3569Anode Multifunction Valve
- U356AAnode Drain Valve Control Circuit
- U356BAnode Drain Valve
- U356CAnode Header Drain Valve Control Circuit
- U356DAnode Header Drain Valve
- U356EAnode Drain Valve Heater Relay Control Circuit
- U356FAnode Header Drain Valve Heater Relay Control Circuit
- U3570Stack Inlet Coolant Temperature Sensor Circuit
- U3571Stack Outlet Coolant Temperature Sensor 1 Circuit
- U3572Stack Outlet Coolant Temperature Sensor 2 Circuit
- U3573Coolant Mixing Valve Control Circuit
- U3574Coolant Mixing Valve
- U3575Coolant Mixing Valve Position Sensor Circuit
- U3576Stack Differential Pressure Sensor Circuit
Code data: OBDex (CC0) · severity bars are our rating (low · moderate · urgent)
02 —More