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Home › Chrysler › 2003 › Voyager Base, 3.3 3 › Repair and Diagnosis › Engine Performance › System › Engine Controls - Tests W/Codes - 3.3L & 3.8L › Diagnostic Tests › DTC P0141: 1/2 O2 Sensor Heater Failure › Testing

DTC P0141: 1/2 O2 Sensor Heater Failure: Testing

  1. Turn the ignition on. With the DRBIII® scan tool, read DTCs. Is the Good Trip counter displayed and equal to zero? If yes, go to step  3. If no, go to next step.
    2. NOTE: Wait a minimum of 8 minutes to allow the O2 sensor to cool down before continuing the test. Allow the O2 sensor voltage to stabilize between 0.4-0.6 volt.
  2. Turn the ignition is on. With the DRBIII® scan tool, actuate the O2 Heater Test. With the DRBIII® scan tool, monitor O2 sensor voltage for at least 2 minutes. Does the voltage stabilize between 0.4-0.6 volt during the Heater Test? If yes, go to next step. If no, refer to the INTERMITTENT CONDITION  under SELF-DIAGNOSTICS SYSTEM.
  3. Turn the ignition off. Allow the O2 sensor to cool down to room temperature. Disconnect the O2 sensor harness connector. Measure the resistance across the O2 sensor heater element component side. Is the resistance between 4.0-7.0 ohms? If yes, go to next step. If no, replace the O2 sensor.
  4. Turn the ignition off. Disconnect the O2 sensor harness connector. Measure the resistance of the O2 sensor heater ground circuit in the O2 sensor harness connector to ground. Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the O2 sensor heater ground circuit for an open.
  5. Turn the ignition off. Disconnect the O2 sensor harness connector. With the DRBIII® scan tool, actuate the O2 Heater Test. Measure the voltage of the ASD relay output circuit in the O2 sensor harness connector. Is the voltage above 11.0 volts? If yes, go to next step. If no, repair the ASD relay output circuit for an open.
    6. NOTE: Before continuing disconnect the Powertrain Control Module (PCM) harness connector and check the related wiring terminals for corrosion, damage or terminal push out. Repair as necessary.
  6. Using the wiring diagram as a guide, inspect the wire harness and connectors. Pay particular attention to all power and ground circuits. If there are no possible causes remaining, replace and program the PCM. See PROGRAMMING .
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