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U354A: Hydrogen Tank A Temperature Sensor 1 Circuit

Severity
Medium
System
Vehicle Systems

What Does U354A Mean?

U354A is a diagnostic trouble code indicating: Hydrogen Tank A Temperature Sensor 1 Circuit. This code relates to the vehicle systems system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of U354A

Common Causes

Frequently Asked Questions

What does U354A mean?
U354A indicates: Hydrogen Tank A Temperature Sensor 1 Circuit. The vehicle's computer has detected that the Hydrogen Tank A Temperature Sensor 1 is not operating within its expected parameters and stored this diagnostic trouble code.
Can I drive with code U354A?
You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with U354A for extended periods may cause additional problems.
How much does it cost to fix U354A?
Repair costs for U354A typically range from $80 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

  • 🔧 Inspect and repair Hydrogen Tank A Temperature Sensor 1 wiring and connectors
  • 🔧 Replace faulty Hydrogen Tank A Temperature Sensor 1
  1. 1
    Find your vehicle above

    Click your make and model for real owner reports and common causes specific to your vehicle.

  2. 2
    Check for recalls

    Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.

  3. 3
    Get a professional diagnosis

    A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

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