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Old 03-09-2010, 03:37 PM
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Question about a particular problem/part
Can anyone tell me what #5 does, exactly? I have replaced the Vac and valve as well as the vac hoses connecting the valve to the #5 and am STILL getting the P0491 and P0492 codes. All I'm left with is thinking this part must be bad. Any suggestions?

2003 3.0i

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Old 03-09-2010, 03:55 PM
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Electric valve. When a voltage is applied to the valve it either opens or closes. My guess is it should open for the system to allow secondary air to enter the manifold.
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Old 03-09-2010, 11:30 PM
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Thanks for your input. I am in love with my wife's X5 - so much that I want to buy one of my own. But, I swear this thing has ears. If I bad mouth it - SERVICE ENGINE SOON lights up. lol
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