Remove the intake manifold chamber.
Disconnect the four ignition coil connectors (A).

Remove the harness holder (B) and the breather hose (C).
Remove the cylinder head cover.

Exploded View
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Secondary HO2S Replacement
Special Tools Required
O2 Sensor Wrench Snap-on S6176 or equivalent, commercially available
Disconnect the secondary HO2S connector (A).
Raise the vehicle on a lift.
...
Fuel Economy
Improving Fuel Economy
Fuel economy depends on several conditions, including driving conditions,
your
driving habits, the condition of your vehicle, and loading. Depending on these
and
other co ...