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Home >> Infiniti >> 2004 >> I35 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System >> DTC P0139 & DTC P0159: Ho2S2 >> DTC Confirmation Procedure
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DTC Confirmation Procedure

NOTE: If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

WITH CONSULT-II 

TESTING CONDITION: 

  1. Start engine and warm it up to the normal operating temperature.
  2. Turn ignition switch OFF and wait at least 10 seconds.
  3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
  4. Let engine idle for 1 minute.
  5. Select HO2S2 (B1) P0139 or HO2S2 (B2) P0159 of HO2S2 in DTC WORK SUPPORT mode with CONSULT-II.
    Fig 1: Displaying HO2S2 (B1) P0139 Screen
    G00786685Courtesy of NISSAN MOTOR CO., U.S.A.
  6. Follow the instruction of CONSULT-II.
    Fig 2: Displaying HO2S2 (B1) P0139 Results Screen
    G00786686Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 3: Displaying HO2S2 (B1) P0139 Completed Screen
    G00786687Courtesy of NISSAN MOTOR CO., U.S.A.
  7. Make sure that OK is displayed after touching SELF-DIAG RESULTS.

    If NG is displayed, refer to DIAGNOSTIC PROCEDURE  . If CAN NOT BE DIAGNOSED is displayed, perform the following.

    1. Turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle).
    2. Turn ignition switch ON and select COOLANTEMP/S in DATA MONITOR mode with CONSULT-II.
    3. Start engine and warm it up while monitoring COOLANTEMP/S indication on CONSULT-II.
    4. When COOLANTEMP/S indication reaches to 70° C (158° F), go to step 3.