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Short EV duration at high speed - shaking going to gas
2017 RAV4 Hybrid XLE - 2300 miles
Hello, experience a problem last week driving on the highway. While driving 75 mph, I took my foot off gas pedal to coast, the "EV" light came on for about "1/2 - 1" second and then went off. If I happened to press the gas pedal at the time the light was on at about 65-70 mph, I experienced a shaking, vibration, and a feeling that I ran over something for about a 1/2 second timeframe. It was very noticeable and troubling. If I waited the second for the light to go off while coasting, then no problems. I was able to constantly recreate the EV light coming on while coasting down from 75 and 4 times, I (gently) accelerated at the moment the EV light came on around 65-70 and experienced the shaking.
I took it to my dealer and they could not recreate, no computer codes, and indicated that this is normal since the electric and gas is "out of sync" at the high speed. This was certainly not normal to me. I can not recreate driving on my local highways now. The EV light does not come on while coasting down from 75 mph. The one difference is that I was sustaining 75 mph last week for a long time on my trip last week (no cruise control).
My thought is that the EV light should never had come on (even for a 1/2 second) at the high speeds and there is a problem somewhere. Any thoughts as what to do next to find the root cause of the problem ? Is this really normal ? Is this something that is part of the "break-in" ?