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Heated Oxygen Sensor

  1. Turn ignition off. Disconnect ECM connector. Connect Breakout Box (981-3190 ) and Adapter (951-1351 ).
  2. To check oxygen sensor signal, connect ohmmeter between breakout box terminal No. 27 and terminal No. 14 (front sensor) or No. 29 (rear sensor). Ohmmeter should read 1.5-13 ohms.
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