2 hours ago, Envy said:

1 Deg F is cold - in electronic terms is is what I would call f'ing cold. Most electronic assemblies have working range temperatures that are dictated by the  operational temperature range (Highest and lowest) of its components. 

We get in our cars and expect everything to work be it -20 or +40 C in all humidity levels and expect them to just work. The more complex cars have become, the more we will get the odd glitch. The way sensors communicate on CAN, it only takes a slightly out of range signal to raise a flag. 

I concede that Software (Firmware) can have a lot to do with what alarms raise and when we see them - note that all the SW and FW is doing is setting how many times a sensor signal has to go out of range and for how long it is OOR before flashing up an alert. Yes sensors can fail rather than get a little confused temporarily but a failed sensor would be raising an alert on every start up  or maintaining a persistent warning on the dash. 

Back in the day of carbs and chokes we would dismiss a miss fire as carb icing in the winter- now we will see an EML come up causing all sorts of concerns. 

I remember those sparks on the HT leads very well. 👍 Along with easy start . 

This is why my Audi is now a Garage Queen during the winter. I went out and bought a 2019 Hyundai Sonata with 95k on the odometer for the winter. My beater with a heater. She’s got dents, dings, and scratches. But it cranks up, runs, and no lights. lol. And if someone door dings it, I don’t care. Hoping she will make it to 150k. That means it will make it about 6 years with me.