Friday I was driving around town, and noticed a slight delay with acceleration. Upon getting about 2/3rd of the way home, etc light came on. First solid, then flashing. Hobbled the car home, and turned off the engine. Waited a couple minutes, and turned the car back on to see if we could get a trouble code or if we could replicate the issue since he knew someone who could fix it. We drove about 20 miles without it triggering again. He took it out yesterday with no issue about 30 miles round trip. Friday night when we got home we tried to pull trouble codes to confirm if it was the sensor or the actual throttle body. No trouble codes were stored. The incident on the way home seems to have been a isolated issue. My question here is this: is the electronic throttle control powered by the battery? I did have the air and radio going and I'm sure I was charging my phone as well so it was under a load of sorts. Battery was done by factory about 2 months ago, and ecm update at the same time. Is there anything I need to watch out for, or was this really just a one off issue and I just need to watch the battery use?