Did the engine make two squeaks when it stopped?

1, which may be the sound of the sensor on the engine or the electronic throttle. I suggest you open the key first, then turn it off before checking. If there is still sound, go to the repair shop to check whether there is something wrong with the sensor or the circuit!

2. It should be the crackling sound produced by the expansion and contraction of the exhaust pipe. Listen to the gas in the exhaust pipe. If it is the sound produced by the expansion and contraction of the exhaust pipe, it is normal.