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Is it common for cylinders 1,3 & 5 to be misfiring on my 2011 Buick LaCrosse 3.6L?

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Is it common for cylinders 1,3 & 5 to be misfiring on my 2011 Buick LaCrosse 3.6L I got the engine codes P0301, P0303, and P0305

Vehicle: 2011 Buick LaCrosse 3.6L

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I would start by checking for an intake leak on bank 1 (passenger side of engine) most likely there is an intake leak or the oxygen sensor (A/F ratio sensor) is bad, since all the codes are on one side of the engine.

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