Cracked exhaust manifold can affect oxygen sensor operation on Buick Skylark

Exhaust manifold may crack causing an exhaust leak . This could affect the oxygen sensor performance and cause a drivability concern.

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Average mileage: (–)
Exhaust & Emissions affected: 2.5L 4 Cylinder
2 model years affected: 1990, 1991
2 people reported this problem
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