Problem Reports » Check Engine Light Due to Intake Manifold Vacuum Leaks

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Cadillac Seville

 

Report: Check Engine Light Due to Intake Manifold Vacuum Leaks

Cadillac Seville Problem
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Model Years Affected: 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004

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An intake manifold vacuum leak can develop from a variety of sources, often causing illumination of the Check Engine Light with codes P0171 & P0174 stored. Thorough diagnoses will be necessary to pinpoint the cause in order to make the correct repairs. A "smoke" machine is often used to isolate the cause of difficult to find vacuum leaks.

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