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Old 08-03-2008, 10:00 PM   #135 (permalink)
gmendoza
My car sneezes
 
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Join Date: Feb 2006
Location: Alta Loma, CA
Posts: 169
hmm. The code P0420 is for catalyst efficiency below threshold. It also sounds like the cat is falling apart. Sounds to me like the code is legit.

Was the cat ever actually checked or were parts blindly thrown at it hoping to hit the problem?
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