DTC P0138, P0158: Notes

DTC P0138  : Rear Secondary Heated Oxygen Sensor (Secondary HO2S (Bank 1, Sensor 2)) Circuit High Voltage DTC P0158  : Front Secondary Heated Oxygen Sensor (Secondary HO2S (Bank 2, Sensor 2)) Circuit High Voltage

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NOTICE:  

Before you troubleshoot, review the How to Troubleshoot .