U0341 signals that the powertrain control module cannot communicate with the hybrid battery interface control module H. This loss of data often triggers hybrid system warnings and may limit vehicle performance.
The module that manages high‑voltage battery communication can develop internal faults, causing it to stop responding to the PCM.
A poor electrical connection at the module's harness can interrupt data bus signals and trigger the code.
A break, short, or high resistance in the CAN wiring between the PCM and module H can prevent proper communication.
A recent software update or incompatible firmware between the PCM and module H may cause a temporary incompatibility.
A failure within the PCM's CAN interface circuit is possible but uncommon; it usually requires extensive diagnosis before replacement.
No, the code usually indicates a communication problem with the battery interface module, not a fault in the PCM itself.
Clearing the code may temporarily turn off the warning, but the underlying communication issue will likely return unless repaired.
The vehicle can usually still operate, but the hybrid system may be limited; it is advisable to have the vehicle inspected promptly.
In some cases a reprogramming of the module or PCM can resolve incompatibility, but only after mechanical and wiring checks.