Air/Fuel O2 sensor question for v6 tundra

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Thread: Air/Fuel O2 sensor question for v6 tundra

  1. #1
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    Default Air/Fuel O2 sensor question for v6 tundra

    I have a P1135 code (bank 1 sensor 1) and I can only see 1 o2 sensor on my exhaust pipe, before the cat. There could be 1 after but I didn't look hard.

    Anyway, the parts guy at Toyota thought there might be only 1 unless it was a California emissions vehicle. He said the v8 has 4. But I didn't really trust him much. He told me he could order the 1 sensor for me for $127 which didn't seem bad.

    I guess my qeustion is, do I only have 1 sensor? The autoxray we connected indicated there were two sensors, sensor number 2 had a 1.275 voltage and number 1 kept saying there was no data which led us to believe that it was the bad sensor.

    anybody have any ideas? I know the v6 tundras are not as common as v8s so it's a little harder to get info.

    thanks.

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    Junior Member v6er's Avatar
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    Default Re: Air/Fuel O2 sensor question for v6 tundra

    Yes you do have a second o2 sensor, its required to monitor catalyst effiecency. its a couple of feet from the cat. if you have california emissions than you have the A/F sensor in the bank1sensor1. i need one as well just cant afford it and it doesnt cause any drivebility problems. I would recommend getting an oem replacement if you do replace it. i warn you, they are expensive. if you need to figure out if you have california emmissions, look under the hood on the emissions label, it well list your emmision devices and if you have california emissions.
    "The glass isnt half empty or half full...
    its twice as tall as it needs to be"
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    Default Re: Air/Fuel O2 sensor question for v6 tundra

    Quote Originally Posted by v6er View Post
    Yes you do have a second o2 sensor, its required to monitor catalyst effiecency. its a couple of feet from the cat. if you have california emissions than you have the A/F sensor in the bank1sensor1. i need one as well just cant afford it and it doesnt cause any drivebility problems. I would recommend getting an oem replacement if you do replace it. i warn you, they are expensive. if you need to figure out if you have california emmissions, look under the hood on the emissions label, it well list your emmision devices and if you have california emissions.

    Well, my truck is running very bad so maybe that's not all that's wrong.

    The o2 sensor is just the only trouble code I have right now.

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    Junior Member v6er's Avatar
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    Default Re: Air/Fuel O2 sensor question for v6 tundra

    ya it shouldnt really give you any issues other than the Engine light and maybe poor fuel economy, can you describe how your trucks running poorly.
    "The glass isnt half empty or half full...
    its twice as tall as it needs to be"
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