Car Problem Reports

Pontiac Bonneville Misfire Due to Failed Ignition Coil

Pontiac Bonneville Problem
3 Reports
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Model Years Affected: 2004, 2005

Engines Affected: 3.8L V6, 4.6L V8


An ignition coil may fail causing one of the cylinders to misfire. Each of the two banks of cylinders has its own coil assembly. If one ignition coil fails the coil assembly for the corresponding cylinder bank must be replaced.

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