What does this hose connect to?

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trn19104

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My mom picked up a 1997 EB 5.4 that started having error codes p1131 and p1151 for the O2 sensors. I was looking around for vacuum leaks and found this disconnected hose, but I have no idea where it's supposed to go. Any help would be appreciated.
 

jr1under

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Can't say for certain from that picture but I think it's the throttle body to intake hose.

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