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Got a cel for PO421, Warm up catalyst below threshold...bad cat? bad 02?

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Old 11-12-2007, 06:24 AM
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Default Got a cel for PO421, Warm up catalyst below threshold...bad cat? bad 02?
Any ideas here? I could care less if its for the cat, as im putting in new dps soon. Any ideas would be great, thanks.


Also, im getting a misfires at idle, could this cause that?
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Old 11-12-2007, 07:28 AM
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bad cat
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Old 11-12-2007, 11:20 AM
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Bad cat. Your misfires probably caused the cat failure. Cat's don't like raw ruel.
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