So it started with my air conditioner going off on a hot day intermidentaly while driving. I live in Vegas so a hot day is 90-110. No warning lights ever came on. It worked fine while moving. It was just traffic. Eventually I discovered low coolant and did an oil change and it did a lot better. During all of this I baught a 10 dollar obd2 WiFi scanner for my phone. I’ve noticed that my car starts at 130 c and can easily end up at 240c after thirty or so minutes of in traffic driving. But I’ve never had a warning light go off. This is with air conditioner on full blast. What’s curious is that the obd2 often shows the ambient temp at nearly 20-30 degrees over what the cars dash says. Now I have heard that running the heat slightly decreases the temp. But when I do that it will set the ambient temp to what the dash says and will drop my temp back to like 180c almost instantly. The car seems to be driving fine. Is it possible that my obd2 I baught is just garbage? My other thought is that there’s air in the radiator. (I accidentally led the cap off and overheated while testing this ) so I was think No about trying to bleed the line on a hill. Any thoughts?