Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2004 Infiniti FX35 AWDFACTORY OEM SERVICE PROCEDURE

Procedure For Malfunction B

CAUTION: Always drive vehicle at a safe speed.

With CONSULT-II

Turn ignition switch ON.
Start engine and warm it up to normal operating temperature.
If engine cannot be started, Go to DIAGNOSTIC PROCEDURE .
Select DATA MONITOR mode with CONSULT-II.
Check the voltage of MAS A/F SE-B1 with DATA MONITOR.
Increases engine speed to about 4,000 RPM.
Monitor the linear voltage rise in response to engine speed increases.

Fig 1: Monitoring MAS A/F SE-B1 Voltage (CONSULT-II)
Courtesy of NISSAN MOTOR CO., U.S.A.

If NG, Go to DIAGNOSTIC PROCEDURE .

If OK, Go to following step.
Maintain the following conditions for at least 10 consecutive seconds.

Fig 2: Identifying Specified Testing Conditions For Malfunction B (DTC P0101)
Courtesy of NISSAN MOTOR CO., U.S.A.

Factory Service Tools

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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.