2001 Infiniti QX4 Problem Reports

RepairPal Verified 2001 Infiniti QX4 Problem Reports

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The Check Engine Light may illuminate with code P0138, P0140, P0158, and/or P0160 stored. Our technicians recommend replacing the rear oxygen sensor, and reprogramming the vehicle's powertrain control module (PCM) with upgraded software to correct this concern.

The mass airflow sensor may fail resulting in a loss of power and/or Check Engine Light illumination with code P0171 and/or P0174 stored. Our technicians recommend replacing the failed airflow sensor to correct this concern.

The heater blower motor may only work on the high speed setting. Our technicians recommend replacing the heater blower motor and fan control amplifier to address this problem.

The rear oxygen sensor may fail resulting in illumination of the Check Engine Light. Our technicians recommend to ensure the latest software is installed in the powertrain control module (PCM) along with replacing the failed O2 sensor.

The 4WD light may flash on and off intermittently with no transfer case related fault code stored in the powertrain control module (PCM). Our technicians recommend to ensure the correct Nissan/Infinity approved fluid is present in the transfer case if this condition occurs.

An abnormal noise may develop from the timing chain area, Our technicians tell us it may be necessary to replace the variable valve timing camshaft shaft sprockets to correct this concern.