Clicking noise from direct injection injectors on Saturn Sky Red Line

The fuel injection system for the 2.0L turbo engine places fuel directly into the combustion chambers. This is called "direct injection". Due to the high fuel pressure associated with this type of system a noticeable clicking noise can be heard from the fuel injectors.
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Average mileage: (–)
3 model years affected: 2007, 2008, 2009
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