I changed the fuel filter, plugs after 7000 KM running only. Also, i added one bottle of STP injector cleaner in full tank. Uptill now, it has not given any troublw with running of 1200 KM more.Lets see if it happens again or not. But i have seen the working of Toyota Capital motors & they were reiterating only one point that their OBD II diagnostic computer was unable to locate the fault code so they were asking me to wait till the fault aggravated. Alsom only few of their mechanics are really trained, rest all are chotas & are learning. They charge unjustified amounts for little work.