How do you reset ecu of a Clio 2008?

To reset the ECU of a 2008 Renault Clio, disconnect the negative terminal of the car battery and leave it disconnected for about 15 minutes to allow the ECU to reset. After that, reconnect the negative terminal and start the car. This process can help clear any error codes and reset the system. However, be sure to check for any persistent issues that may require further diagnostics.