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CEL? P0420

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Aug 27, 2007 | 10:32 AM

Carpediem73456

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Joined: Aug 2007

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CEL? P0420

so last night my CEL came on and i checked the code when i got home and it is giving me a P0420 i checked at what that is and its like a low efficiency cat on bank 1... my question is with 65k on the clock do you think the cat is bad or an o2 sensor? its a 2002 1500 with the 5.9 360

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