Ok, so what does the wrench light mean? Was driving in to work this morning in the snow and felt something that could be described as a surge, maybe? Like I lost power for a split second, then the wrench light came on my instrument panel. I felt a few more of these surges as I drove in. Also, when I revved the engine, it didn't seem as responsive as usual. Any ideas? Idle seems normal though, smooth as always, and no unusual noises anywhere.