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Home >> Nissan-Datsun >> 2004 >> Sentra SE-R Spec V >> Repair and Diagnosis >> External Pages >> Different car >> Section 38 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0138 Or DTC P0158: Ho2S2 >> DTC Confirmation Test (Using Generic Scan Tool) (V6)
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DTC Confirmation Test (Using Generic Scan Tool) (V6)

WARNING: This page is about a different car, the 2002 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the following test to check overall function of HO2S2 circuit. During this test, 1st trip DTC may not be confirmed.
  1. Start engine. Drive vehicle at a speed of more than 43 MPH for 2 consecutive minutes. Stop vehicle with engine running.
  2. Measure voltage between ground and ECM terminal No. 88 (bank 1) or No. 90 (bank 2) by backprobing. See Figure and Figure .
  3. While observing voltmeter, snap throttle to 4000 RPM at least 10 times. Voltage should remain less than 1.4 volts during this procedure.
  4. If voltage is not as specified, go to DIAGNOSTIC PROCEDURE (V6) . If voltage is as specified, system is okay at this time.
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