- 99% of the problem is the battery. 1% can be starter/spark plug. 8 I9 ]3 _' E/ \ N0 t2 Q5 `- 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. 6 O2 H4 {+ i) b9 K+ Z- {* `- make sure there's gas left in the tank 4 n4 F4 y9 j0 n8 `$ L" f& L- 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.