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NCT Fail – CO 1.18 @ High Idle

  • 15-01-2015 9:39am
    #1
    celticbest
    Registered Users, Registered Users 2 Posts: 2,092 ✭✭✭


    Hi, I failed my NCT LAST Friday as,

    Lambda was .96 when range was between .97 & 1.03.
    CO was 1.18 anything above .20 is a fail.

    IMG-20150112-WA0004_zpsf507e900.jpg

    I brought it to my Mechanic on Tuesday & he tested the emissions and said they were fine, he told me to take it back to the Test centre & ask them to re-test it as we got it checked and it’s is fine. I brought it back last night & the person who tested it on Friday couldn’t have been nicer he brought it back in and retested on two different lanes but it failed again…

    Lambda was @ .97 this time so it passed, just about.
    CO was .86 @ so it failed again, above .20.

    IMG-20150115-WA0002140115_zps12dcc346.jpg

    I had emission problems last year as Oil got into the ECU, I replaced the Lambda sensors, magnets, wiring loom & ECU at a cost of over €2,500!

    Does anyone have any idea what my issue is this year?

    Car is a 2004 1.8L Petrol, Mercedes E200 Komprosser (W211)

    Would Dipetane sort it out? https://www.dipetane.com/
    Tagged:


Comments

  • #2
    Sobanek
    Closed Accounts Posts: 3,354 ✭✭✭Sobanek


    Dipetane is useless. It made no difference to my emissions whatsoever.


  • #3
    Eugene Yes
    Registered Users, Registered Users 2 Posts: 37 ✭Eugene Yes


    Would be worth checking lambda sensors on a live data feed to see if working. If they are giving proper signal and you have no exhaust leaks, you may be looking at replacing the catalytic converter.


  • #4
    jimgoose
    Registered Users, Registered Users 2 Posts: 20,193 ✭✭✭✭jimgoose


    Before going mad chopping out cat-converters and so forth, check the air-filter. When was the car last serviced - properly?


  • #5
    celticbest
    Registered Users, Registered Users 2 Posts: 2,092 ✭✭✭celticbest


    jimgoose wrote: »
    Before going mad chopping out cat-converters and so forth, check the air-filter. When was the car last serviced - properly?

    2 years since I changed the Air filter, oil service was done last month. I'll check the air filter to see how clean it looks.


  • #6
    jimgoose
    Registered Users, Registered Users 2 Posts: 20,193 ✭✭✭✭jimgoose


    celticbest wrote: »
    2 years since I changed the Air filter, oil service was done last month. I'll check the air filter to see how clean it looks.

    For the sake of a tenner or so whip it out and replace it. You'd be amazed!


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  • #7
    Sobanek
    Closed Accounts Posts: 3,354 ✭✭✭Sobanek


    Change the air filter. My 6 month old one was pure muck, changed it and High idle CO fell from 0.25 to 0.19 so I passed.


  • #8
    Peterx
    Registered Users, Registered Users 2 Posts: 2,122 ✭✭✭Peterx


    Our Yaris kept failing on high emissions, mechanic kept finding it ok, merry-go-round, eventually sourced problem to the mass air flow sensor.
    Best of luck.


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