AC Expansion Valve May Cause Whistling Sound When AC is Turned On on Honda S2000

A problem can occur with a vibrating expansion valve in the AC system and cause a whistling noise from the passengers vent. Replacing the expansion valve with an updated valve from Honda will repair this problem.

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Average mileage: 97,500 (55,000–140,000)
10 model years affected: 2000, 2001, 2002, 2003, more2004, 2005, 2006, 2007, 2008, 2009
12 people reported this problem
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2006 Honda S2000 55,000 mi,
AC Expansion Valve May Cause Whistling Sound When AC is Turned On