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Old 06-20-2008, 02:40 PM   #1
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Default Went to mechanic--the code P0442 he says he pulled the code for a bad cat. Any ideas. Can I

get an after market one maybe a more performance one and have my mechanic put it in?? My car is over the 8/80 warranty so I am knid of stuck here. I am aware this can be a costly repair.
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Old 06-20-2008, 02:48 PM   #2
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Default The code for a bad cat is just a code. You need to get to the root of the problem before...

...spending any money. First off, what engine and model year?
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Old 06-20-2008, 02:57 PM   #3
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Default It is a 2000 A6 4.2. I replaced the O2 sensor 8-4-2007917819 bank 2 secondary air injection)

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Old 06-20-2008, 03:00 PM   #4
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Default Ugh. OEM O2 sensor? You're probably looking at a cat then. :-(

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2005 A6 Sedan Q 3.2 (wife's whip)
2000 A4 Avant Q 2.8 (daily driver)
1980 VW Scirocco (mid-life crisis car)
1983 Mazda RX-7 (revolutionary sports car)
2003 Mini Cooper S (just because)
1995 Mazda Miata, Superdupercharged(anti-Audi)
1999 Mazda Miata SSB (track beotch, no plate)
2003 GMC Yukon Denali XL (the anti-earth)
2004 Dodge Dakota (hey, at least it's stick and 4x4)
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Old 06-20-2008, 03:06 PM   #5
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Default That is what he told me.I am going to pick-up the car tomorrow and weigh my options.I can drive...

the car the way it is ---- no loss of power or rattling noise.
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Old 06-20-2008, 08:08 PM   #6
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Default Sorry, but I had to fvcking LOL : ) What are the chances that two green 4.2's

would suddenly have bad cats? And amusingly enough, I received my emissions notice today :P
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Old 06-20-2008, 08:29 PM   #7
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Default My dads old 4.2 had a bad cat code from 2003 until it commited suicide in 2007. I really wouldn't wo

rry about it.
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Old 06-20-2008, 09:38 PM   #8
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Default Thanks.I think I am going to get two magnaflow cats and put them on.

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Old 06-21-2008, 03:15 AM   #9
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Default How did it pass emissions?

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Old 06-21-2008, 04:53 AM   #10
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Default BAD CAT from P0442 code only??? No way!!!

P0442 code is a small evap leak, like a gas cap, vacuum line etc. Did you have any other codes like P0420? If not, run away as fast as you can from that mechanic.
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Old 06-21-2008, 04:53 AM
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