问：按下煤气踏板，汽车没有向前移动。因为车辆在一个丘陵的地方，它却向后滚动。发生了什么感冒？

我正处于一个停车标志，准备向左转。我戴上信号向左转。它给了我连续的流行音乐声。正确的。然后，当我将脚从制动器上踩到煤气踏板时，汽车开始向后滚动。这发生过一次。但是在那之后的行驶良好。Inot在3次时加上煤气踏板和制动器，它给了我警告的声音。但是，继续前进。收音机关闭了一秒钟。（警告声是您知道，当您用点火孔中的钥匙将门打开时，汽车发出的声音）然后终于汽车不会摇动。 So called a mechanic who checked and saw that the was corrosion in the line from the battery to the car. He cleaned it and the car started. Well my main concern is the gas pedal. I don't think it's loose. What could have been the cause of it not picking up once. And the odd sound from the signal. Could all these be related to the battery cable

我的汽车有157560英里。
我的汽车有自动变速箱。