OBSII monitors everything on the car, for example my brothers 97 Z28 would actually shut down/off the ignition because a radiator temperautre monitoring sensor had a short in it. This didn't do anything to hurt the car but was a major PitA to get fixed. It would flash the engine light even with the car of.
This could be a sensor problem or somthing completely else. If the car runs fine then I wouldn't bother missing work to take it in, but if its bothering you you can take it autozone or the dealer and get ot checked out.
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