Check Engine Light Due to Failed Rear Oxygen Sensor on INFINITI QX4

Problem overview

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.

INFINITI QX4 vehicles with this problem

1 model year affected

2001 INFINITI QX4

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Check Engine Light Due to Failed Rear Oxygen Sensor on INFINITI QX4

Problem overview

INFINITI QX4 vehicles with this problem

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