Thread: O2 sensor multiple failures
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Old 01-31-2017, 10:56 AM   #1
airboss20
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O2 sensor multiple failures
I have repeatedly replaced the B2S2 O2 sensor on my Tundra 4.7L. I have used the OEM, Cheapos and Bosch sensors over the last 3 years. Every winter I get a "Sensor heater circuit failure" code.

ideas?
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