U354B
Hydrogen Tank A Temperature Sensor 2 Circuit
U354B is an OBD-II diagnostic trouble code meaning: Hydrogen Tank A Temperature Sensor 2 Circuit. Common causes: open or short circuit in the sensor circuit, hydrogen tank temperature sensor malfunction. Estimated repair cost: $56–167.
Symptoms
- Check Engine light comes on
- Reduced engine power
- Incorrect hydrogen temperature readings
- Problems with hydrogen refueling
- Limitation of fuel system operation
Causes
- Open or short circuit in the sensor circuit
- Hydrogen tank temperature sensor malfunction
- Connection problems or contact corrosion
- Control module malfunction
- Mechanical damage to system components
How to Fix
- Check the integrity of wiring and connections
- Test the hydrogen tank temperature sensor
- Check contacts for corrosion
- Scan the control module for errors
- Replace faulty components
- Repair only from an authorized dealer
Related codes
Error U354B by Vehicle Brand
FAQ
What does the U354B code mean?
U354B is an OBD-II diagnostic trouble code that indicates: Hydrogen Tank A Temperature Sensor 2 Circuit
What causes a U354B error code?
The most common causes of U354B include: Open or short circuit in the sensor circuit; Hydrogen tank temperature sensor malfunction; Connection problems or contact corrosion; Control module malfunction.
How do I fix a U354B diagnostic trouble code?
To fix U354B: Check the integrity of wiring and connections. Test the hydrogen tank temperature sensor. Check contacts for corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U354B?
Do not drive — repair immediately
How much does it cost to fix U354B?
The estimated repair cost for U354B is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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