rohitdoshi

No.
Your overall total score measured against all categories is used to rank you and if this is above the Minimum Passing Score (MPS) by at least a few points you will pass irrespective of your Ethics score.
It is suggested by the CFAI that the Ethics results is used as a deciding factor for those who are marginally above or below the MPS and therefore it is suggested you score as well as possible in this section as an additional safety margin.
However, the direct answer to your question is a resounding NO!!!