U CODE FAMILY
Network code references — Page 12.
Communication and network diagnostic references. A communication code does not identify a failed module by itself.
Generic OBD-II
U302E
Ignition Output On
NetworkRead the code
Generic OBD-II
U302F
Ignition Output Accessory
NetworkRead the code
Generic OBD-II
U3030
Ignition Output Start
NetworkRead the code
Generic OBD-II
U3031
Ignition Output Off
NetworkRead the code
Generic OBD-II
U3032
Ignition Output Accessory/Off
NetworkRead the code
Generic OBD-II
U3033
Control Module Security Certificate Missing/Invalid
NetworkRead the code
Generic OBD-II
U3034
Communication Authentication Key/Certificate Missing/Invalid
NetworkRead the code
Generic OBD-II
U3035
Communication Authentication Signal Invalid Data
NetworkRead the code
Generic OBD-II
U3036
Communication Authentication Signal Performance
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Generic OBD-II
U3500
Control Module Input Power A Circuit Range/Performance
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Generic OBD-II
U3501
Control Module Input Power A Circuit Low
NetworkRead the code
Generic OBD-II
U3502
Control Module Input Power A Circuit High
NetworkRead the code
Generic OBD-II
U3503
Control Module Input Power A Circuit Intermittent/Erratic
NetworkRead the code
Generic OBD-II
U3504
Control Module Input Power B Circuit Range/Performance
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Generic OBD-II
U3505
Control Module Input Power B Circuit Low
NetworkRead the code
Generic OBD-II
U3506
Control Module Input Power B Circuit High
NetworkRead the code
Generic OBD-II
U3507
Control Module Input Power B Circuit Intermittent/Erratic
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Generic OBD-II
U3508
Control Module Input Power C Circuit Range/Performance
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Generic OBD-II
U3509
Control Module Input Power C Circuit Low
NetworkRead the code
Generic OBD-II
U350A
Control Module Input Power C Circuit High
NetworkRead the code
Generic OBD-II
U350B
Control Module Input Power C Circuit Intermittent/Erratic
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Generic OBD-II
U350C
Control Module Cooling Fan Circuit/Open
NetworkRead the code
Generic OBD-II
U350D
Control Module Cooling Fan Circuit Low
NetworkRead the code
Generic OBD-II
U350E
Control Module Cooling Fan Circuit High
NetworkRead the code
Generic OBD-II
U350F
Control Module Cooling Fan Circuit Range/Performance
NetworkRead the code
Generic OBD-II
U3510
Control Module Missing Calibration
NetworkRead the code
Generic OBD-II
U3511
High Voltage System Interlock Circuit B
NetworkRead the code
Generic OBD-II
U3512
High Voltage System Interlock Circuit B Performance
NetworkRead the code
Generic OBD-II
U3513
High Voltage System Interlock Circuit B Low
NetworkRead the code
Generic OBD-II
U3514
High Voltage System Interlock Circuit B High
NetworkRead the code
Generic OBD-II
U3515
High Voltage System Interlock Circuit C
NetworkRead the code
Generic OBD-II
U3516
High Voltage System Interlock Circuit C Performance
NetworkRead the code
Generic OBD-II
U3517
High Voltage System Interlock Circuit C Low
NetworkRead the code
Generic OBD-II
U3518
High Voltage System Interlock Circuit C High
NetworkRead the code
Generic OBD-II
U3519
High Voltage System Interlock Circuit D
NetworkRead the code
Generic OBD-II
U351A
High Voltage System Interlock Circuit D Performance
NetworkRead the code
Generic OBD-II
U351B
High Voltage System Interlock Circuit D Low
NetworkRead the code
Generic OBD-II
U351C
High Voltage System Interlock Circuit D High
NetworkRead the code
Generic OBD-II
U351D
High Voltage System Interlock Circuit E
NetworkRead the code
Generic OBD-II
U351E
High Voltage System Interlock Circuit E Performance
NetworkRead the code
Generic OBD-II
U351F
High Voltage System Interlock Circuit E Low
NetworkRead the code
Generic OBD-II
U3520
High Voltage System Interlock Circuit E High
NetworkRead the code
Generic OBD-II
U3521
High Voltage System Interlock Circuit F
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Generic OBD-II
U3522
High Voltage System Interlock Circuit F Performance
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Generic OBD-II
U3523
High Voltage System Interlock Circuit F Low
NetworkRead the code
Generic OBD-II
U3524
High Voltage System Interlock Circuit F High
NetworkRead the code
Generic OBD-II
U3525
High Voltage System Interlock Circuit G
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Generic OBD-II
U3526
High Voltage System Interlock Circuit G Performance
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Generic OBD-II
U3527
High Voltage System Interlock Circuit G Low
NetworkRead the code
Generic OBD-II
U3528
High Voltage System Interlock Circuit G High
NetworkRead the code
Generic OBD-II
U3529
High Voltage System Interlock Circuit H
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Generic OBD-II
U352A
High Voltage System Interlock Circuit H Performance
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Generic OBD-II
U352B
High Voltage System Interlock Circuit H Low
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Generic OBD-II
U352C
High Voltage System Interlock Circuit H High
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Generic OBD-II
U352D
High Voltage System Interlock Circuit J
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Generic OBD-II
U352E
High Voltage System Interlock Circuit J Performance
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Generic OBD-II
U352F
High Voltage System Interlock Circuit J Low
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Generic OBD-II
U3530
High Voltage System Interlock Circuit J High
NetworkRead the code
Generic OBD-II
U3531
High Voltage System Interlock Circuit K
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Generic OBD-II
U3532
High Voltage System Interlock Circuit K Performance
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Generic OBD-II
U3533
High Voltage System Interlock Circuit K Low
NetworkRead the code
Generic OBD-II
U3534
High Voltage System Interlock Circuit K High
NetworkRead the code
Generic OBD-II
U3535
High Voltage System Interlock Circuit L
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Generic OBD-II
U3536
High Voltage System Interlock Circuit L Performance
NetworkRead the code
Generic OBD-II
U3537
High Voltage System Interlock Circuit L Low
NetworkRead the code
Generic OBD-II
U3538
High Voltage System Interlock Circuit L High
NetworkRead the code
Generic OBD-II
U3539
High Voltage System Interlock Circuit M
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Generic OBD-II
U353A
High Voltage System Interlock Circuit M Performance
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Generic OBD-II
U353B
High Voltage System Interlock Circuit M Low
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Generic OBD-II
U353C
High Voltage System Interlock Circuit M High
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Generic OBD-II
U353D
High Voltage System Interlock Circuit N
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Generic OBD-II
U353E
High Voltage System Interlock Circuit N Performance
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Generic OBD-II
U353F
High Voltage System Interlock Circuit N Low
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Generic OBD-II
U3540
High Voltage System Interlock Circuit N High
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Generic OBD-II
U3541
High Voltage System Interlock Circuit O
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Generic OBD-II
U3542
High Voltage System Interlock Circuit O Performance
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Generic OBD-II
U3543
High Voltage System Interlock Circuit O Low
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Generic OBD-II
U3544
High Voltage System Interlock Circuit O High
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Generic OBD-II
U3545
High Voltage System Interlock Circuit P
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Generic OBD-II
U3546
High Voltage System Interlock Circuit P Performance
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Generic OBD-II
U3547
High Voltage System Interlock Circuit P Low
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Generic OBD-II
U3548
High Voltage System Interlock Circuit P High
NetworkRead the code
Generic OBD-II
U3549
Hydrogen Tank High Pressure Sensor 1 Circuit
NetworkRead the code
Generic OBD-II
U354A
Hydrogen Tank A Temperature Sensor 1 Circuit
NetworkRead the code
Generic OBD-II
U354B
Hydrogen Tank A Temperature Sensor 2 Circuit
NetworkRead the code
Generic OBD-II
U354C
Hydrogen Tank B Temperature Sensor 1 Circuit
NetworkRead the code
Generic OBD-II
U354D
Hydrogen Tank B Temperature Sensor 2 Circuit
NetworkRead the code
Generic OBD-II
U354E
Hydrogen Tank C Temperature Sensor 1 Circuit
NetworkRead the code
Generic OBD-II
U354F
Hydrogen Tank C Temperature Sensor 2 Circuit
NetworkRead the code
Generic OBD-II
U3550
Hydrogen Tank A Valve Control Circuit
NetworkRead the code
Generic OBD-II
U3551
Hydrogen Tank A Valve Enable Circuit
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Generic OBD-II
U3552
Hydrogen Tank A Valve Performance
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Generic OBD-II
U3553
Hydrogen Tank B Valve Control Circuit
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Generic OBD-II
U3554
Hydrogen Tank B Valve Enable Circuit
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Generic OBD-II
U3555
Hydrogen Tank B Valve Performance
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Generic OBD-II
U3556
Hydrogen Tank C Valve Control Circuit
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Generic OBD-II
U3557
Hydrogen Tank C Valve Enable Circuit
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Generic OBD-II
U3558
Hydrogen Tank C Valve
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Generic OBD-II
U3559
Air Inlet Pressure Sensor Circuit
NetworkRead the code
Generic OBD-II
U355A
Charge Air Cooler Outlet Pressure Sensor 1 Circuit
NetworkRead the code
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.