my check engine light is on says cats are bad looked at the exhaust cat and looks good

Asked by Guru9TQSW Jun 16, 2017 at 04:06 PM about the 2001 Dodge Stratus SE Sedan FWD

Question type: Maintenance & Repair

2 Answers

9,430

physically looking at it doesn't mean its good. It's what's on the inside that counts. You will likely need to replace the entire cat. converter. Just a heads up, they are expensive ($200-900 if you include labor)

Temperature measurements are one way to diagnose a bad cat. https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

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