Dodge Caliber. Manual — part 1151
1/2 DOWNSTREAM
The downstream heated oxygen sensor threads into
the exhaust pipe behind the catalytic convertor.
1. After removing the sensor, the exhaust manifold
threads must be cleaned with an 18 mm X 1.5 +
6E tap. If reusing the original sensor, coat the sen-
sor threads with an anti-seize compound such as
Loctite
T
771-64 or equivalent. New sensors have
compound on the threads and do not require an
additional coating. Tighten the sensor to 28 N·m
(20 ft. lbs.) torque.
2. Install sensor using an oxygen sensor crow foot
wrench such as Snap-On tool YA8875 or equiva-
lent
3. Connect sensor electrical harness to clips along
body.
4. Connect electrical connector to sensor.
5. Lower vehicle.
6. Install the negative battery cable.
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THROTTLE BODY
DESCRIPTION
The throttle body mounts to the intake manifold. The throttle position sensor and idle air control motor attach to the
throttle body.
OPERATION
Filtered air from the air cleaner enters the intake manifold through the throttle body. The throttle body contains an air
control passage controlled by an Idle Air Control (IAC) motor. The air control passage is used to supply air for idle
conditions. A throttle valve (plate) is used to supply air for above idle conditions.
Certain sensors are attached to the throttle body. The accelerator pedal cable, speed control cable are connected to
the throttle body cam.
A (factory adjusted) set screw is used to mechanically limit the position of the throttle body throttle plate. Never
attempt to adjust the engine idle speed using this screw. All idle speed functions are controlled by the PCM.
REMOVAL
1. Remove the air cleaner lid, disconnect the inlet air
temperature sensor and makeup air hose.
2. Remove the negative battery cable.
3. Remove the engine cover.
4. Remove wire harness clip from air tube.
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5. Remove the electrical connectors from the throttle
body.
6. Remove throttle body support bracket and bolts.
7. Bracket removed and bolts.
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8. Remove throttle body mounting bolts.
9. Throttle body o-ring (1) and location pins (2).
INSTALLATION
1. Make sure that the throttle body gasket (1) is in
place in the manifold.
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