This diagnostic trouble code indicates a communication or functional fault related to the third hydrogen tank valve circuit in fuel cell vehicles. It suggests the control module is unable to properly operate or receive status data from the specific tank valve designated as C.
Physical damage, corrosion, or loose connections in the circuit leading to the valve are the most common causes.
The electromechanical valve itself may have an internal open or short circuit preventing operation.
A protective fuse may have blown due to a surge, or the control relay may have failed internally.
The dedicated module managing the hydrogen system may have an internal driver failure.
Insufficient voltage from the auxiliary battery can disrupt network communication and valve actuation.
While possible, PCM failure is rare and should only be considered after all other circuit components are verified.
No, hydrogen system faults can trigger safety limits that restrict vehicle operation or prevent refueling.
No, replacing the PCM is rarely the correct fix; wiring or valve component failures are significantly more common.
No, high-pressure hydrogen systems require specialized training and equipment for safe service.
No, the code will return until the underlying electrical or mechanical fault is physically repaired.