OBD Guide

U354F

Hydrogen Tank C Temperature Sensor 2 Circuit

U354F is an OBD-II diagnostic trouble code meaning: Hydrogen Tank C Temperature Sensor 2 Circuit. Common causes: hydrogen tank 2 temperature sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Check Engine light comes on
  • Reduced engine power
  • System transition to emergency mode
  • Incorrect hydrogen temperature readings
  • Problems with hydrogen refueling

Causes

  • Hydrogen tank 2 temperature sensor malfunction
  • Open or short circuit in the sensor circuit
  • Poor contact in sensor connectors
  • Wiring harness damage
  • Problems with the engine control unit

How to Fix

  1. Check the integrity of the sensor circuit
  2. Inspect connectors and contacts for corrosion
  3. Test sensor resistance
  4. Replace the faulty sensor if necessary
  5. Repair only from an authorized dealer

Related codes

Error U354F by Vehicle Brand

FAQ

What does the U354F code mean?

U354F is an OBD-II diagnostic trouble code that indicates: Hydrogen Tank C Temperature Sensor 2 Circuit

What causes a U354F error code?

The most common causes of U354F include: Hydrogen tank 2 temperature sensor malfunction; Open or short circuit in the sensor circuit; Poor contact in sensor connectors; Wiring harness damage.

How do I fix a U354F diagnostic trouble code?

To fix U354F: Check the integrity of the sensor circuit. Inspect connectors and contacts for corrosion. Test sensor resistance. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U354F?

Limited driving only, diagnose soon

How much does it cost to fix U354F?

The estimated repair cost for U354F is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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