![]() When the system detects a problem with the sensor, the car’s lightning bolt symbol illuminates. If there is a problem with the throttle control sensor, it does not get the exact reading of the throttle position. The ECM relies on the throttle body position sensor, which gives information to the ECM about how far the throttle body opens or closes. ![]() When you press the gas pedal, the vehicle’s ECM tells the throttle body to open, adjusting the air-to-fuel ratio according to the position of the accelerator pedal. What Causes A Lightning Bolt Warning Symbol?Ī dirty throttle body stuck, a faulty accelerator pedal position sensor, a faulty throttle control sensor, or a wiring issue are the most common causes of the lightning bolt warning light. When you press the gas pedal at that point, the vehicle’s ECM signals the throttle body (ACV) for airflow, and the EFI increases or decreases the fuel flow according to the gas pedal position, and you will get acceleration. The ETC is integrated with your vehicle’s master computer, the engine control unit (ECU), also known as the engine control module (ECM). ![]() The electronic fuel injector (EFI) is also controlled by the electronic throttle control. The ETC consists of the accelerator pedal module and an electronic throttle body (air control valve, or ACV). The electronic throttle control is a technology that electronically connects the accelerator pedal and the throttle control body. What Is Electronic Throttle Control System? Let’s take a deep dive into the electronic throttle control system for a better understanding of the lightning bolt symbol in the car. The lightning bolt warning symbol on the car dashboard starts blinking because of a faulty accelerator pedal position sensor, a faulty throttle control sensor, a stuck or broken throttle body, or a wiring problem. What Does The Lightning Bolt Symbol In Car Mean?Īs we mentioned earlier, the lightning bolt symbol on a car dashboard is the electronic throttle control warning light.
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