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CEL after installing HFC or TEST PIPE

Discussion in 'Audi S4/A4/A4 Cab (B7 Chassis)' started by jakeA42T, Sep 10, 2012.

  1. jakeA42T
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    jakeA42T Member

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    [Sep 10, 2012]
    Thought I would get a CEL but apart the test pipe causing it would it still be ok to drive until it gets remapped or am I causing more problems for myself?
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  3. jdp1962
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    jdp1962 Grumpy Old Moderator Staff Member Moderator

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    [Sep 10, 2012]
    What's an HFC?
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  4. jakeA42T
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    jakeA42T Member

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    [Sep 10, 2012]
    Sorry mate 'High Flow Cat', just another mod I heard good things about.
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  5. Marrow
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    Marrow Member

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    [Sep 10, 2012]
    Dont think HFC will throw CEL but a test pipe will unless you have it mapped out or use a spacer. But wont hurt anything on the car just an irritation !!
    Last edited: Sep 10, 2012
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