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Re: 98 Ford Windstar PO171 code
Disconneting the battery (even for a repair) will reset the codes. When did P101 appear? (Or was it a typo?).
If the problem has been corrected (and a loose hose certainly could have been the problem) then the code will not come back. If the problem still persists then the code and CEL will appear again in a few drive cycles.
If the CEL is on and one makes the repair the light (and code) will eventually clear itself after a few drive cycles.
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