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1998 gmc jimmy po420

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Possible causes. Catalytic converter 20k miles

Vehicle: 1998 gmc jimmy 4.3

1 Answer

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Yes, P0420 it's probably caused by the catalytic converter.

P0420 GMC - Catalyst System Low Efficiency Bank 1

Read more: https://www.autocodes.com/p0420_gmc.html

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