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O2 Circuit High Voltage

Discussion in '1st Gen Tundras (2000-2006)' started by Klingon4x2, Dec 31, 2021.

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Dec 31, 2021 at 11:16 AM

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Klingon4x2 [OP] New Member

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The service light came on for my 2006 Tundra 4 Dr. 2 WD. My code reader gives me the following, O2 Circuit High Voltage Bank 1 Sensor 2. I bought an OEM Oxygen Sensor and replaced the driver side downstream side sensor. Cleared the code and a day later the service light came on and I got the same code with the reader. I check the wire harness and no damage can be observed. Everything is still in the factory plastic wrap bundle. What other problem can give the same fault reading?

Klingon4x2, Dec 31, 2021

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Dec 31, 2021 at 11:24 AM

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Jack McCarthy Working remotely from the local pub

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Any exhaust leaks? That might throw it off I believe; well it seemed to on mine.

Jack McCarthy, Dec 31, 2021

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