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Code P0505 on a 2001 Nissan Xterra indicates an issue with the Idle Air Control (IAC) system. To fix it, first inspect and clean the IAC valve and its passages, as carbon buildup can cause malfunction. If cleaning doesn't resolve the issue, check the electrical connections and wiring to the IAC for any damage or corrosion. If those components are functioning correctly, consider replacing the IAC valve.

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AnswerBot

6d ago

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