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NCT - Lambda fail (screenshot)

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  • 17-01-2017 2:10pm
    #1
    sean29
    Registered Users Posts: 56 ✭✭


    Hi,

    I'm not great with cars so any help would be great. My 02 Corolla petrol failed nct on emissions (lambda) today. The guy said it could be burning oil. I know it has been burning a little bit ever since I remember but it never failed on emissions before. I didn't give it a good spin before the test like I usually did before, should I go to a garage or just drive it hard and try a re-test? Here is the nct read: Thanks

    https://postimg.org/image/prtbb7jhf/
    Tagged:


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    #2
    Atlantic Dawn
    Registered Users Posts: 82,248 ✭✭✭✭Atlantic Dawn
    M


    Try adding Redex to the petrol and driving it hard and then retest.


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    #3
    sean29
    Registered Users Posts: 56 ✭✭sean29


    I added STP petrol treatment 2 days before the test, that's pretty much the same thing isn't it?


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    #4
    Atlantic Dawn
    Registered Users Posts: 82,248 ✭✭✭✭Atlantic Dawn
    M


    sean29 wrote: »
    I added STP petrol treatment 2 days before the test, that's pretty much the same thing isn't it?

    Yes it would be.

    When was the car last serviced with the spark plugs and air filter changed?


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    #5
    sean29
    Registered Users Posts: 56 ✭✭sean29


    It was last serviced in Oct 2015


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    #6
    biko
    Registered Users Posts: 81,222 ✭✭✭✭biko


    Service in Oct 2015? That's 15 months ago. For older cars get service once a year at least.

    Open the air filter box and have a look. The filter should look fresh with no debris in filter or in box.

    Look at oil dipstick, is there any white/yellow discolourations on it?

    Look at coolant, is it nice and brightly coloured?

    It could be the catalytic converter but it is probably worth it to get car serviced with new oil/oil filter and air filter anyway. If you can do it yourself it shouldn't be very expensive.


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    #7
    martinr5232
    Registered Users Posts: 2,298 ✭✭✭martinr5232


    Check your exaust for leaks.


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    #8
    BHP
    Registered Users Posts: 106 ✭✭BHP


    sean29 wrote: »
    Hi,

    I'm not great with cars so any help would be great. My 02 Corolla petrol failed nct on emissions (lambda) today. The guy said it could be burning oil. I know it has been burning a little bit ever since I remember but it never failed on emissions before. I didn't give it a good spin before the test like I usually did before, should I go to a garage or just drive it hard and try a re-test? Here is the nct read: Thanks

    https://postimg.org/image/prtbb7jhf/


    It failed on High Idle CO (Carbon Monoxide) at 0.66. The limit is 0.30.
    Look at the report again.
    The Lambda passed at 1.01 which was between the limit of 0.97 - 1.03
    So probably not a leaky exhaust.


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    #9
    rex-x
    Registered Users Posts: 1,893 ✭✭✭rex-x


    Your car didn't fail on the lambda OP it failed on the co reading, your car is actually running slightly lean (1.01 lambda) which should reduce the co value in your favour but because you have still failed its very likely your cat is on the way out! Burning oil will slowly reduce the effectiveness of the cat


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