Dodge Neon / Neon SRT-4. Manual — part 290
catalytic convertor efficiency. Also used to establish
the upstream O2 goal voltage (switching point).
REMOVAL
REMOVAL - UPSTREAM 1/1
(1) Raise and support vehicle.
(2) Unplug sensor connector.
(3) Remove sensor using an oxygen sensor crow
foot wrench such as Snap-On tool YA8875 or equiva-
lent (Fig. 45).
(4) After removing the sensor, the exhaust mani-
fold threads must be cleaned with an 18 mm X 1.5 +
6E tap. If reusing the original sensor, coat the sensor
threads with an anti-seize compound such as Loctite
t
771-64 or equivalent.
REMOVAL - DOWNSTREAM 1/2
The downstream heated oxygen sensor threads into
the exhaust outlet pipe behind the catalytic convertor
(Fig. 46).
(1) Raise vehicle.
(2) Disconnect electrical connector from harness.
(3) Disconnect sensor electrical harness from clips
along body.
(4) Remove sensor using an oxygen sensor crow
foot wrench such as Snap-On tool YA8875 or equiva-
lent (Fig. 47).
(5) After removing the sensor, the exhaust mani-
fold threads must be cleaned with an 18 mm X 1.5 +
6E tap. If reusing the original sensor, coat the sensor
threads with an anti-seize compound such as Loctite
t
771-64 or equivalent.
REMOVAL - 2.4L TURBO/2.4L SRT-4
(1) Disconnect the negative battery cable.
(2) Unlock and disconnect the electrical connector.
It is on the passenger side near the EVAP purge sole-
noid.
(3) Raise vehicle and support.
(4) Remove sensor (Fig. 48) using an oxygen sen-
sor crow foot wrench such as Snap-On tool YA8875 or
equivalent
INSTALLATION
INSTALLATION - UPSTREAM 1/1
New sensors have compound on the threads and do
not require an additional coating.
Fig. 45 Upstream Heated Oxygen Sensor Removal/
Installation
1 - EXHAUST PIPE FLANGE
2 - CROW FOOT WRENCH
3 - UPSTREAM OXYGEN SENSOR
Fig. 46 Downstream Heated Oxygen Sensor
1 - CATALYTIC CONVERTOR
2 - DOWNSTREAM OXYGEN SENSOR
Fig. 47 Downstream Heated Oxygen Sensor
Removal/Installation
1 - DOWNSTREAM HEATED OXYGEN SENSOR
2 - CATALYTIC CONVERTOR
14 - 42
FUEL INJECTION
PL/SRT-4
O2 SENSOR (Continued)
(1) Install sensor using an oxygen sensor crow foot
wrench such as Snap-On tool YA8875 or equivalent
(Fig. 45). Tighten the sensor to 28 N·m (20 ft. lbs.)
torque.
(2) Plug sensor connector.
(3) Lower vehicle.
INSTALLATION - DOWNSTREAM 1/2
The downstream heated oxygen sensor threads into
the exhaust outlet pipe behind the catalytic convertor
(Fig. 46).
New sensors have compound on the threads and do
not require an additional coating.
(1) Install sensor using an oxygen sensor crow foot
wrench such as Snap-On tool YA8875 or equivalent
(Fig. 47). Tighten the sensor to 28 N·m (20 ft. lbs.)
torque.
(2) Connect sensor electrical harness from clips
along body.
(3) Connect electrical connector to harness.
(4) Lower vehicle.
INSTALLATION - 2.4L TURBO/2.4L SRT-4
(1) Install O2 sensor (Fig. 48) using an oxygen
sensor crow foot wrench such as Snap-On tool
YA8875 or equivalent and tighten to N·m 28 (20 ft.
lbs.).
(2) Route O2 sensor wire (Fig. 49) above the heat
shield for the generator and away from the exhaust
manifold.
(3) Lower vehicle.
(4) Connect and lock the O2S connector. It is on
the passenger side near the EVAP purge solenoid.
(5) Connect the negative battery cable.
THROTTLE BODY
REMOVAL
REMOVAL - 2.0L
(1) Disconnect the negative battery cable (Fig. 50).
(2) Remove the air cleaner box cover.
Fig. 48 UPSTREAM O2 SENSOR- 2.4L TURBO
Fig. 49 O2 WIRE ROUTING
1 - O2 Sensor Electrical Connector
2 - Wire routing
3 - O2 Sensor
4 - Heat Shield
5 - Generator
Fig. 50 Battery Negative Cable
PL/SRT-4
FUEL INJECTION
14 - 43
O2 SENSOR (Continued)
(3) Remove the air cleaner element (Fig. 51). Pull
up on element, past the lip in the box, to remove it
from the air cleaner box.
(4) Disconnect the electrical connection at the
throttle body.
(5) Loosen the clamp on throttle body outlet hose.
(6) Remove the bolts holding the throttle body to
the air cleaner box (Fig. 52).
(7) Remove cable’s from throttle body cam (Fig. 53)
and (Fig. 54).
REMOVAL - 1.6L
If any components on the throttle body are bad, the
throttle body has to be replaced, except the seal to
the intake manifold (Fig. 55) or (Fig. 56). There is no
serviceable component on the throttle body.
NOTE: The electrical connector must be pointed
toward the front of vehicle and purge nipple must
be in the up position for proper orientation of the
throttle body (Fig. 57).
(1) Disconnect the negative battery cable.
(2) Remove the throttle clean air duct at the throt-
tle body.
(3) Disconnect the electrical connector at the throt-
tle body.
Fig. 51 Air Cleaner Element
1 - LIP
Fig. 52 Throttle body bolts
Fig. 53 Disconnecting Throttle Cable
Fig. 54 Transmission Kickdown Cable Connector
14 - 44
FUEL INJECTION
PL/SRT-4
THROTTLE BODY (Continued)
(4) Disconnect the vacuum line from the throttle
body.
(5) Remove the 4 bolts from the throttle body (Fig.
57).
(6) Remove the throttle body.
REMOVAL - 2.4L SRT-4
(1) Disconnect the negative battery cable.
(2) Unlock and disconnect the electrical connector
for the ambient air temperature sensor (Fig. 58).
Fig. 55 THROTTLE BODY FRONT
Fig. 56 THROTTLE BODY BACK
Fig. 57 THROTTLE BODY
Fig. 58 AMBIENT AIR TEMP. SENSOR - 2.4L SRT-4
PL/SRT-4
FUEL INJECTION
14 - 45
THROTTLE BODY (Continued)
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