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P0138 Diagnostic Trouble Code Discussion for November 2012

Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage

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Trouble Ticket Help Requests for DTC P0138
Help Request Posted
2005 Toyota Tundra SR5 4.7L MIL Lamp on VIN: 5TBBT44195
P0138: Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage. This Toyota Tundra sets a PO138 on the second trip after clearing the code. Replaced the B1S2 O2 After finding nothing conclusive. The B1S2 O2 sensor has a voltage between .8v and .9v while the B2S2 O2 sensor has a voltage at .1v after the truck is warm. Test...
November 02, 2012