If your car won’t start, the cable connections on the battery might be bad or loose. A car won’t start if it’s in gear. If it won’t start in park but will start in neutral or vice versa—or it’s in gear and is starting anyway—it might be a bad neutral safety switch, which can be very dangerous. If it fails, the engine won’t run. If your car’s steering wheel gets stuck in the locked position, it may not allow the car to start.