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996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

codes p0491 an p0492

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Old Mar 2, 2011 | 06:49 AM
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milk911 is infamous around these parts
codes p0491 an p0492
hi guys, i got this problems on my car. has anybody got this and got it fixed!? thanks
 
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Old Mar 2, 2011 | 06:55 AM
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Interesting info here http://www.renntech.org/forums/index...92-o2-problem/
 
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Old Mar 2, 2011 | 07:52 AM
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Related to your air pump. When you start the car can you hear this pump starting in the right forward corner of the engine bay ? This electric pump supply air to the catalytic converter at start for converter efficiency. If the pump start it is normally a leak in the small sense lines on top of the engine. But the bad part it is possible to be related to a faulty diverter valve.
 
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Old Mar 2, 2011 | 09:26 AM
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I had the same issue I had a huge vacume leak. First check to see if the pump starts up then check the hoses, also your dv's. Good luck!
 
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Old Mar 2, 2011 | 06:34 PM
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milk911 is infamous around these parts
Thanks everyone I will see if I have an vacuum leak!! I'm glad I join this forum!!
 
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Old Mar 2, 2011 | 06:34 PM
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milk911 is infamous around these parts
I keep this updated...
 
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