Hello aspirant ,

You definitely need to appear for CET examination again to be eligible for getting admission in associated colleges.

You can reappear for your 12 improvement from open schooling ( to get improvement in required subjects) which would further help you to boost up your preparations.

To know more regarding same you can refer the link given below-

https://engineering.careers360.com/articles/mht-cet

I hope this helps.

Regards

Madhur