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Lights the check engine lamp
U3555: Hydrogen Tank B Valve Performance
Standardized SAE J2012 code · U35xx codes
What does U3555 mean?
Hydrogen Tank B Valve Performance: the component is electrically intact but its response does not match the command.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Common causes
- High Valve stuck mechanically
- Low Gateway module routing CAN messages incorrectly
- Low CAN terminating resistor (120 Ω) drifted out of spec
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of U3555 on the same make and model first.
U3555 in the community
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