I'm comfortable with driving without any of those things -- my motorcycle, for example, only has a speedometer and a non-resettable odometer. (It's like that fr

I'm comfortable with driving without any of those things -- my motorcycle, for example, only has a speedometer and a non-resettable odometer. (It's like that from the factory. Many street-legal motorcycles are similarly equipped.) You know how much fuel you have by knowing the capacity of you vehicle's tank, how many hours or miles you have driven, and your pre-existing (or found on the internet) knowledge of you vehicle's fuel consumption. My car's battery gauge has never worked, not in the 20+ years that my father and I have owned it. (I don't know if it worked for the one person that owned it before him, or if it never ever worked.) The only time it would have been helpful is the one time the alternator died. OP has an electric hybrid, so it's a bit more useful to them, but still not critical. The "check engine light" is helpful to people who know little about their vehicle, telling them "please take me to a mechanic!" Otherwise, they seem to be more annoying than helpful -- the family minivan that said "I need an oil change!" because changing the oil yourself didn't reset the counter, or the endless O2 sensor replacements the SUV wanted. You could learn much more, and with less annoyance, by sticking an inexpensive ODB2 reader into your car once in a while.