Car Problem Reports

Pontiac GTO Check Engine Light Due to Gas Cap or Catalytic Converter

 
Pontiac GTO Problem
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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.

  • Visitor, , 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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