How do you reset ETS light 2000 v70?

To reset the ETS (Electronic Throttle System) light on a 2000 Volvo V70, first, turn off the ignition and then disconnect the negative battery terminal for about 10-15 minutes. Reconnect the battery terminal and start the vehicle to see if the light has turned off. If the light remains illuminated, it may indicate an underlying issue that needs to be diagnosed with an OBD-II scanner. Always consider having the system checked by a professional if problems persist.