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Re: F150 3.5L Catalyst Failures
Posted to Technical Discussion Forum on 1/11/2024 3 Replies

We got it in and ran the testing on it. Catalyst appears to be junk so I told him to make good on the warranty since he can, but we also found the oxygen sensors were both loose. I usually recommend replacing them with a new cat anyways so he opted for that in... Login to read more.

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