mine just came on too, but I think it has something to do with the fact that all four oxygen sensors were pulled from the exhuast system to get the transmission replaced. One may have gotten oil from the mechanic's fingers on it and is not working right.
A quick plugging up to a PST2 tool he'll borrow from the dealership where he works will tell us where the problem lies. Good rule of thumb is to make sure all caps are tight (fuel, oil, radiator) and stop driving the car if it blinks on and off... that's serious.
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