Hi there!
Today I have seen the Service Engine Soon light to the board of my Nissan Murano 2005 till now when I start the engine it goes on until I turn the engine off.
Would you Advice what the problem may be, or how I can fix it.

I will appreciate your help.

Thank you.

The "Service Engine Soon" light means that there is a problem with you Murano that can affect the emissions. The first thing you need to do is to check for engine codes. Most auto parts (e.g AutoZone) and some independent shop will check the code free for you. Once you have the code you can get and idea what the problem is.