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DTC Code Glossary

Look up any of the 11,957 OBD-II diagnostic trouble codes in our database — what it means, and how we can permanently remove it from your ECU.

All P B C U
U353E
High Voltage System Interlock Circuit N Performance
U353F
High Voltage System Interlock Circuit N Low
U3540
High Voltage System Interlock Circuit N High
U3541
High Voltage System Interlock Circuit O
U3542
High Voltage System Interlock Circuit O Performance
U3543
High Voltage System Interlock Circuit O Low
U3544
High Voltage System Interlock Circuit O High
U3545
High Voltage System Interlock Circuit P
U3546
High Voltage System Interlock Circuit P Performance
U3547
High Voltage System Interlock Circuit P Low
U3548
High Voltage System Interlock Circuit P High
U3549
Hydrogen Tank High Pressure Sensor 1 Circuit
U354A
Hydrogen Tank A Temperature Sensor 1 Circuit
U354B
Hydrogen Tank A Temperature Sensor 2 Circuit
U354C
Hydrogen Tank B Temperature Sensor 1 Circuit
U354D
Hydrogen Tank B Temperature Sensor 2 Circuit
U354E
Hydrogen Tank C Temperature Sensor 1 Circuit
U354F
Hydrogen Tank C Temperature Sensor 2 Circuit
U3550
Hydrogen Tank A Valve Control Circuit
U3551
Hydrogen Tank A Valve Enable Circuit
U3552
Hydrogen Tank A Valve Performance
U3553
Hydrogen Tank B Valve Control Circuit
U3554
Hydrogen Tank B Valve Enable Circuit
U3555
Hydrogen Tank B Valve Performance
U3556
Hydrogen Tank C Valve Control Circuit
U3557
Hydrogen Tank C Valve Enable Circuit
U3558
Hydrogen Tank C Valve
U3559
Air Inlet Pressure Sensor Circuit
U355A
Charge Air Cooler Outlet Pressure Sensor 1 Circuit
U355B
Charge Air Cooler Outlet Pressure Sensor 2 Circuit
U355C
Charge Air Cooler Outlet Temperature Sensor Circuit
U355D
Expander Inlet Pressure Sensor 1 Circuit
U355E
Expander Inlet Pressure Sensor 2 Circuit
U355F
Cathode Backpressure Valve Control Circuit
U3560
Cathode Backpressure Valve Position Sensor Circuit
U3561
Cathode Bypass Valve Control Circuit
U3562
Cathode Bypass Valve
U3563
Cathode Bypass Valve Position Sensor Circuit
U3564
Hydrogen Supply Line A Pressure Sensor 1 Circuit
U3565
Hydrogen Supply Line A Pressure Sensor 2 Circuit
U3566
Anode Inlet Pressure Sensor 1 Circuit
U3567
Anode Inlet Pressure Sensor 2 Circuit
U3568
Anode Multifunction Valve Control Circuit
U3569
Anode Multifunction Valve
U356A
Anode Drain Valve Control Circuit
U356B
Anode Drain Valve
U356C
Anode Header Drain Valve Control Circuit
U356D
Anode Header Drain Valve
U356E
Anode Drain Valve Heater Relay Control Circuit
U356F
Anode Header Drain Valve Heater Relay Control Circuit
U3570
Stack Inlet Coolant Temperature Sensor Circuit
U3571
Stack Outlet Coolant Temperature Sensor 1 Circuit
U3572
Stack Outlet Coolant Temperature Sensor 2 Circuit
U3573
Coolant Mixing Valve Control Circuit
U3574
Coolant Mixing Valve
U3575
Coolant Mixing Valve Position Sensor Circuit
U3576
Stack Differential Pressure Sensor Circuit