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Home >> Jeep >> 2003 >> Wrangler Rubicon, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 14 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P1195: 1/1 O2 Sensor Slow During Catalyst Monitor Or DTC P1196: 2/1 O2 Sensor Slow During Catalyst Monitor >> Testing

DTC P1195: 1/1 O2 Sensor Slow During Catalyst Monitor Or DTC P1196: 2/1 O2 Sensor Slow During Catalyst Monitor: Testing

WARNING: This page is about a different car, the 2003 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: Check for contaminants that may have damaged the O2 Sensor such as contaminated fuel, unapproved silicone, oil and coolant.
  1. Turn ignition on, engine not running. With the DRBIII®, read DTCs. Is the Good Trip counter displayed and equal to zero? If yes, go to next step. If no, go to INTERMITTENT CONDITION  under SELF-DIAGNOSTIC SYSTEM.
  2. Start the engine. Inspect the exhaust for leaks between the engine and the O2 Sensor. Inspect the exhaust for leaks between the engine and the appropriate rear O2 Sensor. Are there any exhaust leaks? If yes, repair or replace the leaking exhaust parts as necessary. If no, go to next step.
    3. NOTE: Ensure the voltmeter leads meet the terminals in the connector and that there is good terminal to wire connection. Ensure the voltmeter leads are connected for positive polarity.
  3. Turn the ignition off. Using a voltmeter, backprobe between the O2 Sensor Signal circuit at the O2 Sensor harness connector and the PCM harness connector. Start the engine. Allow the engine to idle. Is the voltage below 0.10 volt? If yes, go to next step. If no, repair the high resistance on the O2 Sensor Signal circuit.
    4. NOTE: Ensure the voltmeter leads meet the terminals in the connector and that there is good terminal to wire connection. Ensure the voltmeter leads are connected for positive polarity.
  4. Ensure the engine is still idling. Backprobe between the O2 Sensor ground circuit at the O2 Sensor harness connector and the PCM harness connector. Is the voltage below 0.10 volt? If yes, go to next step. If no, repair the high resistance on the (K4) O2 Sensor ground circuit.
  5. Turn the ignition off. If there are no possible causes remaining, replace the O2 Sensor.
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