evm solenoid?

Hi I have a 2002 Renault scenic megane dynam+ auto and I believe I have a fault with the evm solenoid

As I'm driving the car from cold it seems to drop a gear and then seems like the clutches are slipping I also get a check gearbox warning light come on.

If its the evm solenoid valve where is it placed and is it an easy fix.

I know it will need a diagnostic after to programme the new solenoid

Many Thank
Arthur