Town & Country V6-3.8L (2009)
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Go To 4
No
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Test complete.
4. O2 SENSOR
1. Turn the ignition off.
NOTE: Check for contaminants that may cause improper O2 Sensor operation, such as contaminated fuel, unapproved silicone, or evidence
of oil or coolant.
2. Disconnect the O2 Sensor harness connector.
3. Turn the ignition on.
4. With a scan tool, monitor the O2 Sensor voltage.
NOTE: The voltage should be approximately 5.0 volts with the connector disconnected.
5. Connect a jumper wire between the signal circuit and the return circuit in the O2 Sensor harness connector.
NOTE: The voltage should drop from 5.0 volts to 2.5 volts with the jumper wire in place.
Is the O2 Sensor voltage displayed on the scan tool as described?
Yes
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Replace the O2 Sensor.
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Perform the PCM VERIFICATION TEST. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Diagnostic
Trouble Code Tests and Associated Procedures/Verification Tests/PCM Verification Test.
No
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Go To 5
5. O2 SENSOR SIGNAL CIRCUIT
1. Using the wiring diagram/schematic as a guide, inspect the O2 Sensor Signal circuit and connectors between the O2 sensor and the PCM.
2. Check the O2 Sensor signal circuit for a short to ground, open circuit, short to voltage, or high resistance.
Were any problems found?
Yes
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Repair as necessary.
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Perform the PCM VERIFICATION TEST. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Diagnostic
Trouble Code Tests and Associated Procedures/Verification Tests/PCM Verification Test.
No
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Go To 6
6. O2 SENSOR RETURN CIRCUIT
1. Using the wiring diagram/schematic as a guide, inspect the O2 Sensor Return circuit and connectors between the O2 sensor and the PCM.
2. Check the O2 Sensor return circuit for a short to ground, open circuit, short to voltage or high resistance.
Were any problems found?
Yes
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Repair as necessary.
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Perform the PCM VERIFICATION TEST. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Diagnostic
Trouble Code Tests and Associated Procedures/Verification Tests/PCM Verification Test.
No
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Go To 7
