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:
From outside the vehicle
The remote key locks and unlocks all of the doors and the trunk.
Before the vehicle can be locked from the outside with the remote key, the driver's
door must be closed. Any other door/trunk th ...
Brake fluid
Location of the brake fluid reservoir
Checking the level
The fluid reservoir is concealed under the
round cover at the rear of the engine compartment.
The round cover must be removed first
be ...
How do states use OBD II for emission inspections?
Many states connect a computer directly to a
vehicle's OBD II system. The inspector can
then read "faults." In some states, this type of
inspection has replaced the tailpipe emission
...
