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2004 Volkswagen Jetta 2.0L with engine code P0420. Just replaced the spark plugs

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2004 Volkswagen Jetta 2.0L with engine code P0420. Just replaced the spark plugs

Vehicle: 2004 Volkswagen Jetta 2.0L

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Best answer
Hi there,

Usually I would clear this code and see if it returns. If it does, then I would suspect the converter needs to be replaced.
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P0420 Volkswagen Code - Catalyst System Efficiency Below Threshold Bank 1
Read more: https://www.autocodes.com/p0420_volkswagen.html

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