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Buick Regal Problems

Check Engine Light With Code P0171 and/or P0174 on Buick Regal

Problem Description and Possible Solution

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.

(20 people reported this problem)

Buick Regal Vehicles With This Problem

RepairPal Verified
Average mileage: 125,000 (100,000–150,000)
Exhaust & Emissions affected: 3.8L V6
8 model years affected: 1997, 1998, 1999, 2000, more2001, 2002, 2003, 2004
Not Your Buick Regal Problem?
Brake problem? Or maybe a faulty head gasket cylinder?
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