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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...
  2. Question about O2 sensor

    Intake and Exhaust
    Hey guys, I know how to replace the p0031 bank 1 sensor 1 but I need some help in actually purchasing the part. I should buy a denso sensor correct? Is this for bank1 upstream? When I go to rock auto or amazon I'm very confused as to what the actual sensor I need (laugh away) any help would...
  3. 2003 Sequoia O2 Sensor Replacement

    On my 4x4, I have code P0031 - bank1, sensor 1 low voltage. I have the replacement part and have read other posts about this replacement but I can't locate the sensor on the vehicle. Can someone please help me find the sensor?