catalyst system below threshold bank 1

Asked by Guru6HS6D Mar 22, 2020 at 06:30 PM about the 2004 Hyundai Elantra GLS Sedan FWD

Question type: Maintenance & Repair

I have a 2004 Hyundai Elantra with two catalytic converters. Should I replace
the first or the second, or both to fix the error code?

1 Answer

A muffler shop can check the back pressure to tell you if one or both are bad.

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