KT200II ECU Programmer from ECUHELP has been confirmed to successfully read and write the Clio 4 0.9Tce Valeo V50 via OBD. To ensure a smooth operation and prevent any potential power-off issues that could damage the ECU, it is recommended to connect the engine fuse to the battery.

Image:
The provided image showcases the KT200II being used to write to the Clio 4 0.9Tce Valeo V50 via OBD with 100% success.
KT200II Read and Write Clio 4 0.9Tce Valeo V50 via OBD

Conclusion:
ECUHELP KT200II proves to be a reliable and efficient tool for programming the Clio 4 0.9Tce Valeo V50 ECU via OBD. With the precaution of connecting the engine fuse to the battery, users can confidently perform read and write operations without the risk of damaging the ECU.