U3550

Hydrogen Tank A Valve Control Circuit

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$167–556 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Possible problems with hydrogen refueling
Unusual sounds from the hydrogen tank area

Causes

Hydrogen tank solenoid valve malfunction
Open or short circuit in wiring harness
Problems with the control unit
Contact corrosion
Mechanical damage to the valve

How to Fix

Check the condition of the hydrogen tank valve
Test the control circuit for opens and short circuits
Check connections and contacts
Replace faulty valve if necessary
Repair only from an authorized dealer

Related codes

U3540 U3560 U3570