![]() ![]() That’s also the case if you replace the throttle body. Otherwise, you will have to take it to a dealer. If you notice it’s dirty, give it a good cleaning with a throttle body spray.Īlso, note that the throttle body might need a reset/relearn afterward You can consult your vehicle’s service manual if you have one to see how. What happens is that carbon build-up, or any dirt and grime that enters through the air filter, can cause the throttle valve to stick or not fully close. And if you notice any of the above symptoms, you should first do a visual inspection of the throttle body. Unfortunately, you won’t always get a warning light if the ETC malfunctions. ETC SymptomsĬauses of an ETC Warning Light (Lightning Bolt Symbol) However, if it so happens that you don’t get the warning light, here are other symptoms you can pay attention to if you suspect this to be the problem. The symptoms of faulty ETC are plenty, but the most obvious one is the lightning bolt or a check engine light. Symptoms of a Faulty ETC (Electronic Throttle Control) If it’s not, you will see a lightning bolt warning light. This sensor measures the actuator’s input and sends the information to the ECM.īased on that information, the ECM then determines whether or not the actuator input is consistent with the driver’s input. Lastly, another potentiometer, called the throttle position sensor, sits on the throttle valve actuator’s other side. The ECM then sends a signal to the throttle body actuator or motor to open the throttle valve precisely how much the driver wants. A potentiometer on the throttle pedal measures the driver’s input the more you open it, the more voltage is sent to the ECM (engine control module). How Does ETC (Electronic Throttle Control) Work But small technological improvements like these sometimes count the most once they add up. In that case, it orders the transmission to shift and opens the throttle while maintaining the same driving speed.įurthermore, while cruising, the engine control unit can do micro corrections to the throttle valve to decrease fuel consumption and pollution without the driver noticing.Īll that means the ETC system is very beneficial in multiple areas, although not much. The engine and transmission control units can work together to determine how much throttle input is needed at each moment to maximize the smoothness of each gear shift.Īlso, suppose the engine control unit determines that the fuel consumption will be lower in a higher gear with a little more throttle input. That said, automatic transmission cars reap the most benefits from an ETC system. Since emergencies are all about time, this system might just save your life one day. The stability control, ABS, and other driving aids have more control and a quicker reaction time over the throttle when it’s electronically operated. There are some benefits to an ETC system (also called drive-by-wire) compared to a manual throttle, and they are primarily about safety. What Is ETC (Electronic Throttle Control)īefore the ETC system, drivers controlled the throttle via good old cables connecting the throttle pedal and the throttle body. ![]() Now that we know what the lighting bolt symbol means let’s dive deeper into how it works, the symptoms, and the causes. In any case, you should have it fixed as soon as possible. That means any part of the system might have failed, the throttle position sensor, actuator, throttle pedal, or there is an issue with the throttle body. The lightning bolt dashboard light indicates an issue with the ETC (electronic throttle control). However, the lightning bolt symbol car owners might be confused if they see this one. Since they haven’t changed much in decades, it will be easy for the more seasoned drivers to recognize what the common ones mean. Every modern car has dozens of different dashboard warning lights and symbols. ![]()
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