Check Engine Light Due to Intake Manifold Vacuum Leaks on Cadillac Seville
Problem overview
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.
12 people reported this problem
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Cadillac Seville vehicles with this problem
11 model years affected
Average mileage: 200,000 miles
(200,000 - 200,000)
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