So relieved to see others are having same problem. I've been going mad over my '19 Jazz' tire pressure warning system.
False alarm last summer and a couple over the winter. Then I actually had a flat tire, so started "believing" in the system again. Flat kind of came out of nowhere though, I suspect it was gravel due to roadwork outside out building. Anyway,
Then last night, on a longish trip (80 miles+) it went off again. Obvs nervous since it was late and I have no spare. And I was alone. But it worked out; I checked at a station and no difference in pressure. I'd even checked the same morning tbh, because I don't want any trouble. Then a little later, say maybe an hour of driving, the service light (car arrow wrench) went on. WTF? Weird as hell since I serviced acc. to schedule in October.
I have no idea what is going on, but maybe it's the fact that I had a flat and now am driving on 1 summer tire and 3 winter (am scheduled to change this weekend)? Maybe that causes the car to roll less efficiently or something. We use studded tires here in the winter.
Regardless, I am getting really nervous about this car, esp. on longer trips. Feel like I can't trust it. Good to know others are having the same issue.