Never raise engine speed above 3,600 rpm during the DTC Confirmation Procedure. If the engine speed limit is exceeded, retry the procedure from step 2 .
Before performing the following procedure, confirm that battery voltage is more than 11V at idle.

WITH CONSULT-II

Start engine and warm it up to the normal operating temperature.
Turn ignition switch OFF and wait at least 10 seconds.
Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
Let engine idle for 1 minute.
Select DATA MONITOR mode with CONSULT-II. See Figure .
Hold engine speed at 2,000 rpm and check one of the following.
- HO2S1 (B1)/(B2) voltage should go above 0.70V at least once.
- HO2S1 (B1)/(B2) voltage should go below 0.21V at least once.
If the check result is NG, perform DIAGNOSTIC PROCEDURE .

If the check result is OK, perform the following step.
Let engine idle at least 5 minutes.
Maintain the following condition at least 50 consecutive seconds.

Fig 1: Displaying DATA MONITOR Conditions
Courtesy of NISSAN MOTOR CO., U.S.A.

During this test, P0134 and/or P0154 may be displayed on CONSULT-II screen.
If DTC is detected, go to DIAGNOSTIC PROCEDURE .

Fig 2: Checking Overall Function Of The Closed Loop Control

Courtesy of NISSAN MOTOR CO., U.S.A.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Testing Condition