A bolt of red lightning which is the electronic throttle control indicator symbol is the lightning bolt in between parenthesis or reverse brackets. It shines or gives a light alert warning if there is a problem or fault in the electronic throttle control system. Immediately you see the red lightning in your vehicle, you should know that there is something wrong with your throttle system, and you need to get that checked out as soon as you can. Driving around with a faulty throttle system isn’t good for your vehicle in any way, even for your safety.