Could very well be an issue with sensor Resistance due to the climate change. I have seen this on this car now a few times. Very sensitive and I am sure that everything is fine. I would jounce the float (push down on it a few times) and then reset everything. Lock the car for 15 minutes with key further than 15 to 20 feet away. Then cycle the key. This should handle it. Otherwise you could have a faulty sensor.