U354A

Hydrogen Tank A Temperature Sensor 1 Circuit

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$133–278 (est.)

Symptoms

Check Engine light comes on
Engine power limitation
Possible hydrogen system error messages
Incorrect hydrogen temperature readings
The car may go into emergency mode

Causes

Hydrogen temperature sensor malfunction
Open or short circuit in wiring
Poor contact in connectors
Contact corrosion
Malfunction of the hydrogen system control unit

How to Fix

Check the resistance of the temperature sensor
Inspect wiring and connectors for damage
Check the power and ground of the sensor circuit
Scan the control unit for additional errors
Replace temperature sensor if necessary
Repair only from an authorized dealer

Related codes

U354B U354C U354D