What it means
Hydrogen Tank C Temperature Sensor 1 Circuit: an electrical fault is present in the circuit.
At a glance
- Usually lights the warning light of the system that lost communication
How it works
Hydrogen tank C temperature sensor 1 measures temperature at the vehicle-designated tank C location. This code indicates an electrical fault in that sensor's circuit, which may prevent the control module from receiving a dependable tank C sensor 1 reading.
Common causes
Most likely first.
- Temperature sensor failed
- Gateway module routing CAN messages incorrectly
- CAN terminating resistor (120 Ω) drifted out of spec
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
How to diagnose it
- Scan the fuel-cell and related modules, save freeze-frame data, and look for additional faults naming tank C, sensor 1, or communication.
- Check live data for tank C temperature sensor 1 and compare it with other tank readings for a missing, fixed, or implausible value.
- Visually inspect the tank C sensor 1 connector and accessible harness for looseness, corrosion, moisture, or damage without disturbing hydrogen components.
- Test sensor 1 circuit power, ground, signal, and continuity against the vehicle manufacturer's diagram and specifications.
- If the circuit is intact, test tank C temperature sensor 1 to the manufacturer's procedure and check gateway or CAN data routing if indicated.
Common fixes
- Secure or clean a confirmed poor connection at tank C temperature sensor 1.
- Repair damaged sensor 1 wiring or a verified circuit power or ground fault.
- Replace tank C temperature sensor 1 if it fails the specified test and its wiring is sound.
- Correct a confirmed gateway or network fault affecting tank C sensor data.
Can I keep driving?
This fault can make the tank C sensor 1 temperature reading unreliable. If fuel-cell warnings, reduced power, or shutdown warnings appear, stop safely and follow the vehicle's instructions.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.