Anyone have a clue?!
Rent me! per hour
Joined: 03-22-07
Posts: 24,161
Likes: 20
From: Still fixing others mistakes.
it happens. the stock cat has a certain flow characteristic to it. which the rear 02 is calibrated to. when you change the cat. this flow number changes. hence why some cars throw this code, and some do not. it will not hurt anything, just an annoying check engine light
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