Check Engine Light With Code P0138, P0140, P0158, and/or P0160: INFINITI QX4 Muffler & Exhaust

Problem overview

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.

12 people reported this problem

3 comments

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INFINITI QX4 vehicles with this problem

4 model years affected

Average mileage: 122,766 miles

(98,100 - 166,720)

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Check Engine Light With Code P0138, P0140, P0158, and/or P0160 on INFINITI QX4

Problem overview

INFINITI QX4 vehicles with this problem

Need a diagnosis? Trust our INFINITI experts.

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Ask our experts about your INFINITI.