

It actually relies on the throttle control sensor to tell it how far the throttle has actually opened and makes fuel-to-air ratio adjustments based on that.Īs every good mechanic knows, you need to trust but verify. Just because your vehicle’s ECM tells the throttle to open a specific amount doesn’t mean that the ECM trusts that it will. We’ve taken a deep dive into the three most common problems below. But while those are the most common causes of an electronic throttle light, they aren’t the only things that could be going on. The most common causes of an electronic throttle control light are a faulty throttle control sensor or a faulty throttle accelerator pedal position sensor. What Causes An Electronic Throttle Control Light To Come On? While these tools can’t tell you with 100 percent certainty what the problem is, they can give you a good place to start your search. The easiest way to narrow down where you need to look is to hook up an OBD2 reader. However, if the light stays on, you have an underlying problem that you need to address. At this point, your vehicle is completing a system check, and when everything checks out, the light should turn off. The only other time you should see the electronic throttle control light is when you turn on your vehicle. When it’s not, the light turns on to let you know that there is a problem. Your electronic throttle control light monitors the throttle control system to ensure that everything works the way it should. Electronic Throttle Control Light Function While there are plenty of advantages to this, if everything isn’t working the way it should, then you’re not going to accelerate the way you should. While older vehicles use a cable that’s linked directly to the throttle body, most modern cars accomplish this feat through sensors and your vehicle’s ECM. The electronic throttle control system controls and monitors the position of the throttle. The throttle system includes the throttle body, accelerator pedal, and wirings. The electronic throttle control (ETC) light indicates that there is an issue with the throttle system. References What Does The Electronic Throttle Control Light (ETC) Mean?
