Finally got it checked at Elegant cars, Patparganj industrial area. The culprit is ECU (or ACM). The new one will cost me whopping 20k-22k. As mentioned earlier as well FIP also needs repair and also need a new battery(DIN 60). So the total cost of repairs is going to be around ~50K including labour. Need suggestions---- should I go for repairs or get it exchange for new Linea/Punto for 60K. I have checked with one Dealer in Delhi and they are offering exchange on old Fiat cars.