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Thread: lambda confusion

  1. #1
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    Default lambda confusion

    Been having problems with my car for some time now and had codes read and was showing up rear o2, priced up and would cost £120 for the lambda on the yh engine

    Code was p0136 02 sensor circuit malfunction (bank 1 sensor 2)

    The mechanic said the rear one should not effect the performance and cause the problems i am having (poor acceleration and bogging down @ 4500rpm)

    However i was on the phone to vauxhall today and the tech guy said it would as it is a comparison sensor on the yh engine....when it reads different or is inoporitive it will effect my fueling


    I AM CONFUSED..lol Internet says one thing and the tech guy says another

    Who's Correct, Really need to spend the money on the most important part first.

    After all this i decided to get an emmisions test and had some weird results



    Fast idle test

    co was 0.00% vol
    HC was 0.00% vol
    Lambda was slightly high @ 1.022 (reccomended values of 0.970 - 1.030)

    Would this indicate a lean engine?

    All this does not help now that i have a noisy timing chain aswell Starting to give up

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    Regular Member cerbrious's Avatar
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    Default

    slightly high lambda could be something as simple as an air leak in the exhaust drawing in more air.
    downstream o2 sensor can knock out the fuelling i had it on my dads corsa c
    price seems very hight though at £120 try your local motor factor and specify a NTK one there very good should be around £70 ive found them to be as good as OE and very reliable

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    Default

    Quote Originally Posted by cerbrious View Post
    slightly high lambda could be something as simple as an air leak in the exhaust drawing in more air.
    downstream o2 sensor can knock out the fuelling i had it on my dads corsa c
    price seems very hight though at £120 try your local motor factor and specify a NTK one there very good should be around £70 ive found them to be as good as OE and very reliable

    Thanks Cerbrious will try the local motor factors tomorrow

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