TT (Mk1) Discussion Discussion forum for the Mk1 Audi TT Coupe & Roadster produced from 2000-2006

Aftermarket Diverter Valve causes "Check Engine"

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Old Aug 23, 2002 | 11:34 AM
  #1  
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gio
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Default Aftermarket Diverter Valve causes "Check Engine"

To make a long story short, my water pump died, and I had my TT towed to get fixed. They fixed it but had trouble installing the new timing belt (they said it was off by a notch at first). Afterwards, the car ran fine, but the check engine light would come on and my VAG tool said something about an inconsistent timing error or something (I don't remember the exact one). I cleared it, but it came back.

I took my TT to the dealer and they said it was
a "aftermarket diverter valve installed" error. I'd never seen that before and I had the bailey DV for 2+ years. What is going on? They charged me $35 for the half an hour of labor to look at it.
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Old Aug 23, 2002 | 11:57 AM
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"aftermarket diverter valve installed" -- sounds like your dealer has a case of "BS error."
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Old Aug 23, 2002 | 12:02 PM
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Default My Bailey DV went bad and caused the check engine light to come on.

I think my dealer said it was a secondary air system code. Replaced the Bailey with the N DV, and it's been fine since.
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Old Aug 23, 2002 | 12:09 PM
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Aren't the Bailey's lifetime guarenteed?
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Old Aug 23, 2002 | 12:24 PM
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yes -- whoever you purchased it from (awe tuning?) should replace it for free if it's defective.
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Old Aug 23, 2002 | 01:05 PM
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I've heard that, but I never persued that option. The Bailey was given to me by a forum member.
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Old Aug 23, 2002 | 02:23 PM
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Default My OEM DV (pre-N version) caused a CEL ...

when it was going bad (also got the tell-tale honking sound). I am now using the Forge 007 DV w/o any problems and getting all of the benefits outlined so many times here in the Forum.
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