Check engine light reads bad catalyst

Asked by Feb 17, 2018 at 12:17 PM about the 1999 Pontiac Grand Am 4 Dr SE1 Sedan

Question type: Maintenance & Repair

Can bad catalyst cause my
1999grandam 2.4l to run
ruff and no power

1 Answer

244,405

Yes because a plugged up cat will not allow the engine to breath.

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