The light doesn't come on for no reason. You need to check the error codes to see what is not working correctly.
The one I've seen most often is 07 oil sensor fault, which is usually the oil pressure sensor not closing it's contacts when the pressure is relieved after the motor is switched off. The electronics see this as a fault as it believes you have operating no oil pressure switch.
Start your motor, switch it off after a minute or so, then turn the key back on. Fault temporarily gone away? It's probably a faulty oil pressure switch.
