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      12-05-2018, 08:53 PM   #1
starbury689
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Fault Codes after changing cat-back exhaust

I will be changing out my stock exhaust for a full Meisterschaft cat-back exhaust on my F10 M5 soon, and was wondering if this change would trigger and fault codes?
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      12-06-2018, 04:34 AM   #2
Pikey Motorsports
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No it shouldn’t
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      12-06-2018, 08:22 AM   #3
theinfamousdrew
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Not sure it would cause a fault, but did you plug or reconnect the vacuum line?
It sounds silly but I've heard this can cause issues if not connected or plugged.
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      12-06-2018, 10:31 AM   #4
RagtagXMASTER
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make sure you plug your old vacuum lines or you will have a boost leak and the car will feel severely under powered. I know because it happened to me on my FI exhaust.
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