Heated oxygen sensors

The heated oxygen sensors monitor the oxygen content of the exhaust gases. Readings are fed into a control module that continuously monitors engine functions and controls fuel injection. The ratio of fuel to air into the engine is continuously adjusted for efficient combustion to help reduce harmful emissions.
See also:
Gasoline containing alcohol and ethers, "Oxygenated fuels"
Some fuel suppliers sell gasoline containing
"oxygenates" which are usually alcohols or
ethers. In some areas, state or local laws
require that the service pump be marked indicating
...
Oil volume
...
Under the Hood
A 2.4-liter inline-five-cylinder produces 168 horsepower in the base wagon.
The high-performance T5 holds a turbocharged 2.5-liter five-cylinder that
generates 218 hp and 236 pounds-feet of torque ...
