A Mobile Ad-hoc Network (MANET) is a set of remote versatile hubs shaping an element self-sufficient system. Hubs speak with one another without the mediation of concentrated access focuses or base stations. In MANET various issues have been encountered that degrades the performance of the network. These problem are congestion occurs in the network sue to peer to peer communication. Sometime a single node received large amount data than that a node can transmit further to destination. This issue get extend to data loss due to congestion occurred on a node. Optimum path assures guaranteed delivery of data from source to destination. In this paper a novel approach that is based early detection of congestion at each node has been used for congestion avoidance in the proposed work. Priority and probability has been assigned for all the nodes so that data can be transmitted in effective manner. On the basis of various parameters it has been analyzed that proposed approach provides better congestion avoidance as compare to existing approaches.