Dodge Nitro. Manual — part 683

Fig. 107: Identifying Oxygen Sensors - 3.7L
Courtesy of CHRYSLER LLC

1. Raise and support vehicle.

2. Disconnect wire connector from O2S sensor.

3. Remove O2S sensor (3) or (4) with an oxygen sensor removal and installation tool.

4. Clean threads in exhaust pipe using appropriate tap.

REMOVAL - 4.0L

CAUTION: Never apply any type of grease to the oxygen sensor electrical connector,

or attempt any soldering of the sensor wiring harness.

WARNING:

The exhaust manifold, exhaust pipes and catalytic converter become very
hot during engine operation. Allow engine to cool before removing
oxygen sensor.

CAUTION: When disconnecting sensor electrical connector, do not pull directly

on wire going into sensor.

2007 Dodge Nitro R/T

2007 ENGINE Fuel System - Nitro

Fig. 108: Identifying CKP/Oxygen Sensors - 4.0L
Courtesy of CHRYSLER LLC

1. Raise and support vehicle.

2. Disconnect wire connector from O2S sensor.

3. Remove O2S sensor (3) or (4) with an oxygen sensor removal and installation tool.

4. Clean threads in exhaust pipe using appropriate tap.

INSTALLATION

INSTALLATION - 4.0L

CAUTION: Never apply any type of grease to the oxygen sensor electrical connector,

or attempt any soldering of the sensor wiring harness.

WARNING:

The exhaust manifold, exhaust pipes and catalytic converter become very
hot during engine operation. Allow engine to cool before removing
oxygen sensor.

CAUTION: When disconnecting sensor electrical connector, do not pull directly

on wire going into sensor.

2007 Dodge Nitro R/T

2007 ENGINE Fuel System - Nitro

Fig. 109: Identifying CKP/Oxygen Sensors - 4.0L
Courtesy of CHRYSLER LLC

Threads of new oxygen sensors are factory coated with anti-seize compound to aid in removal.DO NOT add
any additional anti-seize compound to threads of a new oxygen sensor.

1. Install O2S sensor (3) or (4). Tighten to 41 N.m (30 ft. lbs.).

2. Connect O2S sensor wire connector.

3. Lower vehicle.

INSTALLATION - 3.7L

2007 Dodge Nitro R/T

2007 ENGINE Fuel System - Nitro

Fig. 110: Identifying Oxygen Sensors - 3.7L
Courtesy of CHRYSLER LLC

Threads of new oxygen sensors are factory coated with anti-seize compound to aid in removal. DO NOT add
any additional anti-seize compound to threads of a new oxygen sensor.

1. Install O2S sensor (3) or (4). Tighten to 41 N.m (30 ft. lbs.).

2. Connect O2S sensor wire connector.

3. Lower vehicle.

BODY-THROTTLE

REMOVAL

THROTTLE BODY - 3.7L

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
Powertrain Control Module (PCM).

Fig. 111: Identifying Throttle Body Flange, Mounting Bolts & Electrical Connector - 3.7L
Courtesy of CHRYSLER LLC

1. Disconnect and isolate negative battery cable at battery.

CAUTION: Using a diagnostic scan tool, record any previous DTC's (Diagnostic

Trouble Codes).

CAUTION: Never have the ignition key in the ON position when/if checking the

throttle body shaft for a binding condition. This may set DTC's.

2007 Dodge Nitro R/T

2007 ENGINE Fuel System - Nitro