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#1
November 10th 04, 06:50 AM
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Turbo bypass valve/secondary air injection?
How is the Turbo bypass cutoff valve related to the secondary air
injection system? Why would a failed Turbo bypass valve throw a p0411 trouble code? Aren't they separate systems? 
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#2
November 10th 04, 10:47 PM
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both valves need vacuum to operate. If the Turbo bypass cutoff valve
diaphragm is cracked and leaking, then both systems has no vacuum to operate the secondary air injection system > wrote in message ... > How is the Turbo bypass cutoff valve related to the secondary air > injection system? Why would a failed Turbo bypass valve throw a p0411 > trouble code? Aren't they separate systems? >
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