How do modern cars regulate temperature so well?

pro451bee said

318willrun is correct , modern vehicles don't have real gauges , as I was told they are merely virtual gauges and will tell you what the manufactures want you to see. None are a directly wired gauge. All pulse width modulated thru the buss and software .The fuel and tachometers are fairly accurate thou.

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Woah. I hope the speedometers are accurate too???

I think you might be thinking throttle (or drive) by wire is some sort of witchcraft compared to the traditional throttle cables that had a physical linkage between the gas pedal and carb or throttle body?

Rest assured, throttle or drive by wire is not witchcraft. Nowadays, most cars do not have that cable. Instead, the throttle valve is electronically actuated by the ECU (Electronic Control Unit) using inputs from the accelerator pedal. Based on the inputs, the ECU is programmed to run an actuator (a body which moves under the influence of an external element, most probably an electronic unit). The actuator, in turn, opens the throttle valve or butterfly valve to a specified amount. The actuation process is carried out by a servomotor.