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  1. Help Regarding Heater Control code

    Lighting & General Electrical
    Hi Super smart helpful enthusiasts. My 04 V8 4.7 Tundra had the code P0031 come up, which is H025 (or H02S) meaning Heater Control Circuit low Bank 1 Sensor 1 (and possibly Bank 1 Sensor 2). Can I get some help with what this means and the severity? I susperced it was related to very little...