LEMON Manuals: Even more car manuals for everyone
Home >> Jeep >> 2003 >> Wrangler Rubicon, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 14 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0133: 1/1 O2 Sensor Slow Response, DTC P0139: 1/2 O2 Sensor Slow Response, DTC P0153: 2/1 O2 Sensor Slow Response Or DTC P0159: 2/2 O2 Sensor Slow Response >> Testing

DTC P0133: 1/1 O2 Sensor Slow Response, DTC P0139: 1/2 O2 Sensor Slow Response, DTC P0153: 2/1 O2 Sensor Slow Response Or DTC P0159: 2/2 O2 Sensor Slow Response: 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 related 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. Backprobe the O2 Sensor Signal circuit at the O2 Sensor harness connector and 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. Turn the ignition off. Backprobe the (K4) O2 Sensor ground circuit at the O2 Sensor harness connector and 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 ground circuit.
  5. There are no possible causes remaining, replace the O2 Sensor.
scientia non olet · About LEMON Manuals