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  1. #1
    Join Date
    Mar 2018
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    sunderland
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    25

    Default Help sourcing Airflow sensor following catalytic converter

    Just had a diagnostic due to engine management light. Turns out to be Airflow oxygen sensor following catalytic converter. Can anyone help me to identify which of the two sensors this is! I don't know where the catalytic converter is? Smart 450 2005 0.7. I'm burning hot using more fuel than necessary.
    Last edited by Pocetsize; 25th June 2018 at 16:51.

  2. #2
    Join Date
    Oct 2017
    Location
    Bury Lancs
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    95

    Default Re: Help sourcing Airflow sensor following catalytic converter

    Quote Originally Posted by Pocetsize View Post
    Just had a diagnostic due to engine management light. Turns out to be Airflow oxygen sensor following catalytic converter. Can anyone help me to identify which of the two sensors this is! I don't know where the catalytic converter is? Smart 450 2005 0.7. I'm burning hot using more fuel than necessary.
    The cat is part of the exhaust .... just after the manifold. Though I do most jobs on my cars, as it'll probably require heat to remove it I think I'd ask the garage for a price to do it for me.

  3. #3
    Join Date
    Jul 2005
    Location
    over here
    Posts
    13,599

    Default Re: Help sourcing Airflow sensor following catalytic converter

    I'd change both , the top one (pre-cat) is the one to produce poor MPG if fatigued.


    The lower one (post-cat) is just used to monitor the efficiency of the cat.


    You may have other issues too though.
    fq101.co.uk

  4. #4
    Join Date
    Oct 2013
    Location
    Swindon Wiltshire
    Posts
    73

    Default Re: Help sourcing Airflow sensor following catalytic converter

    I have a few laying around in garage
    2008 Mercedes CLS320 Cdi Brabus
    2003 Roadster Coupe Bluewave SB2
    2002 Ex Fortwo Pulse
    2001 Ex Jaguar XKR 100

    Smart,Mercedes & Jaguar Diagnostics

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