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

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: (–)
1 model year affected: 2001
2 people reported this problem