2010 Honda Odyssey with 89k miles, at highway speeds there is a "shudder" in the engine.
At highway speeds, there is a feeling from the engine every so often, feels a little like going over a bump, but there is no bump. Happens with cruise control on and with it off. At first thought it was related to the "eco" feature but cannot find a consistent pattern to the bump and the light coming on, being of, or going off. It does not cause the speed or rpms to change. No indicator lights come on. Any ideas what it may be or how to fix it?