Absolutely. Not just on Subaru but every car built that has an oxygen sensor. And they all do.
All of the engine sensors can affect fuel mileage.
yes
Tires do not have oxygen sensors. They can have pressure sensors. The lack of pressure sensors would have no affect on fuel economy.
As much as the dealership was willing to give you. Value of the vehicle depends on options, mileage, overall condition, demand, and retention value. What you're trading it in towards will also affect it... you'll get more to trade it in for a new car than for a used car.
If this vehicle has high mileage I would start with the plug\wires and oxygen sensors. These would all affect fuel mileage on higher mileage vehicles. Hope this helps you.
any of the oxygen sensors could affect gas mileage but usually the first one in the exhaust pipe on either side causes the most driveabilty issues.
Yes, it can affect the oxygen sensors and catalytic converter.Yes, it can affect the oxygen sensors and catalytic converter.
The quick answer is "Yes, cold weather affects everything that moves." Your Subaru was designed to withstand the temperature extremes that this planet experiences. Componnents that are already close to failure are placed under increased stress at temperature extremes and failure may come more quickly at those times. Does this help? --Ken
If it is malfunctioning it can affect fuel mileage.
no.
It shouldn't, but if your injectors were dirty, then the O2 sensors probably are too.
Yes it can.