U3549

Hydrogen Tank High Pressure Sensor 1 Circuit

Severity

🔴 High

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Malfunction indicator light comes on
Reduced engine power
Problems starting the engine
Incorrect hydrogen pressure readings
System transition to emergency mode

Causes

Open or short circuit in the sensor circuit
High pressure sensor malfunction
Poor contact in the sensor connector
Wiring harness damage
Control unit malfunction

How to Fix

Check the integrity of wiring and connectors
Measure resistance and voltage at the sensor
Test the high pressure sensor
Check connections to the control unit
Replace the faulty sensor if necessary