Instructions
Check the batteries in your remote control. If the remote control for your RC car begins to beep, this could indicate that the batteries in the unit need to be changed. This will vary depending on exactly what type of RC car and remote control you have purchased. Some RC car remotes take lithium ion batteries, while others take standard AA or AAA batteries.
Check the fuel level in your RC car if your car is gas powered. Certain remote control cars that operate on gas have a warning noise that is emitted when the fuel level gets too low. This essentially indicates that your RC car is about to stop working. Check the fuel level and make any adjustments as necessary and use your RC car again to see if that doesn't stop the beeping.
Move closer to your RC car using your remote control. Certain models of RC car remote controls have a warning beep that indicates when your RC car is about to leave the range of the remote control. This will cause the RC car to stop working, as it has physically moved farther away from the remote than the remote's radio signals can broadcast. Move closer to your RC car while holding your remote and try again.