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Heated Oxygen (O2) Sensor

NOTE: For additional oxygen sensor information, see TITANIA OXYGEN SENSOR TESTING article.
  1. On Comanche, Cherokee and Wagoneer, disconnect O2 sensor connector. Using an ohmmeter, connect ohmmeter leads to sensor connector terminals "A" and "C" (marked on connector).
  2. On Wrangler, connect ohmmeter leads to sensor connector terminals "A" and "B" (marked on connector).
  3. Ohmmeter should read between 5-7 ohms resistance. Replace O2 sensor if reading is not within specification or if ohmmeter displays an infinity reading.
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