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DTC P0136 - Ho2S No. 2 Circuit Malfunction

WARNING: This page is about a different car, the 1996 Suzuki Sidekick. However, it is still accessible from the selected car via links, so may be relevant.
  1. Connect scan tool to Data Link Connector (DLC). Drive vehicle for at least 2 minutes at 35 MPH or greater. While revving engine, observe HO2S No. 2 parameter on scan tool. If display reads zero volts, go to next step. If display reading is 0-1 volt, check for an intermittent problem. See TESTS W/O CODES article. If display reading is greater than 1 volt, go to step 3).
  2. Turn ignition off. Disconnect HO2S No. 2 harness connector. Start engine. Using a voltmeter, measure voltage between terminals No. 1 and 2 of HO2S No. 2 while revving engine. See Figure . If reading is 0.1-0.9 volt, go to step 4). If reading is not as specified, replace HO2S No. 2. Retest system.
  3. Turn ignition off. Disconnect HO2S No. 2 harness connector. Turn ignition on. Observe HO2S No. 2 parameter on scan tool. If display reads zero volt, replace HO2S No. 2. If reading is not as specified, go to step 5).
  4. Check wires at terminals No. 1 and 2 of HO2S No. 2 for open or short to ground. Repair as necessary. If wires are okay, replace PCM. Retest system.
  5. Check wire at terminal No. 2 of HO2S No. 2 for short to power. Repair as necessary. If wire is okay, replace PCM. Retest system.
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