Car Problem Reports

Buick Regal Check Engine Light due to vacuum leak in EGR tube

Buick Regal Problem
13 Reports
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Model Years Affected: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004

Exhaust & Emissions Affected: 3.8L V6

Average Mileage: 125,000 mi (100,000 mi - 150,000 mi)


The exhaust gas recirculation (EGR) tube which connects the EGR valve to the intake manifold may develop an engine vacuum leak, causing the Check Engine Light to illuminate with code P0171 and/or P0174 stored.

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