It could make it better, but nost likely make it worse.
How it rides, handles, fuel mileage and power are affected.
Tires do not have oxygen sensors. They can have pressure sensors. The lack of pressure sensors would have no affect on fuel economy.
definatley.
I'm assuming that you are asking about fuel mileage. Reduced fuel mileage is mostly caused by under inflated tires. 32 psi for the Toyota Echo tires is required. Don't buy fuel boosters or fuel cleaners because they don't work.
If it is malfunctioning it can affect fuel mileage.
The Simple answer: Radial Tires Roll down the road easier. How and Why is quite complicated
Under inflated tires will affect any car's performance and thus be a safety hazard as well as a cost to the owner in the way of lower fuel mileage and additional wear on the tires. The fuel mileage on under inflated tires I would say is about 1-5mpg reduction. However, that's not the biggest concern. On an AWD vehicle you want all tires to have the same amount of wear as well as proper inflation to prevent any damage to the differential and computer. Driving short distances with under inflated tires wont hurt the vehicle but it would not be something I would recommend long term.
Yes, higher rpm uses more fuel
No, your speedometer will be off and power and fuel mileage will be adversely effected.
If your tires are under inflated the resulting "resistance" created will lower your gas mileage. However, if you maintain the correct pressure in your tires it reduces the resistance and improves your car's efficiency. It's also safer.
All of the engine sensors can affect fuel mileage.
yes