Problem Reports » Check Engine Light Due to Gas Cap or Catalytic Converter

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Pontiac GTO

 

Report: Check Engine Light Due to Gas Cap or Catalytic Converter

Pontiac GTO Problem
4 Reports
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Model Years Affected: 2004, 2005, 2006

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A loose or worn gas cap or a faulty catalytic converter are two common items which can cause Check Engine Light to illuminate.

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  • Visitor, 2004 Pontiac GTO, 106,213 mi

    Check engine light came on a few days ago. Got it checked and there was an error for catalyst efficiency below normal.

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