- 99% of the problem is the battery. 1% can be starter/spark plug. 5 f$ W( _* K& `' |1 `% c7 `' @- if it's automatic transmission, check to see if the gear is set in park position. if it's in drive or reverse, you cannot start your vehicle. + I1 i/ I! M3 R6 G9 Y6 @& T- make sure there's gas left in the tank & i1 r* u' F$ M- depand on how old your car is, it may have a computer built in to control fuel injection. if the computer breaks, you won't be able to start the car either.