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04 VW Beetle Code Problems
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broknindarkagain
New User
Apr 9, 2010, 7:13 AM
Post #1 of 7
(5822 views)
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04 VW Beetle Code Problems
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I've been having some problems with my 04 Volkswagen Beetle (2.0L) with about 120K miles on it.
My original problem was that I was throwing a catalytic converter code, so I replaced the bad converter with a universal converter. Within a few days the new converter had already been burned up and the light came back on. At that point I did a tune up (plugs and wires) and replaced the cat again (with the same one under warranty).
Now I'm stuck in the same situation but worse. I'm throwing the following codes
P0411 16795 Secondary Air Injection System Incorrect Flow Detected
P0420 16804 Catalyst System, Bank1 Efficiency Below Threshold
I figured that the cat has been burned up again, but why do I keep burning up these brand new converters over and over again. And as far as the air injection code, I'm kind of in the dark on that one. Is that related the the converter codes that I keep having, or could that be a separate issue all together?
I've been trying to get this figured out for a month now and I've got just about nowhere. I have had a few other car savvy friends look at it as well and they are clueless too.
Any pointers in the right direction would be great
Thanks for the help
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Hammer Time
Ultimate Carjunky
/ Moderator
Apr 9, 2010, 7:18 PM
Post #2 of 7
(5814 views)
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Re: 04 VW Beetle Code Problems
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I really doubt you took out a brand new cat that fast. You likely either have another issue or those universal cats just aren't sufficient capacity for that vehicle which happens a lot.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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broknindarkagain
New User
Apr 10, 2010, 6:09 AM
Post #3 of 7
(5804 views)
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Re: 04 VW Beetle Code Problems
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I burned through two brand new cats that fast. I'm using cherry bomb cats that are made to be compatible with that car.
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Hammer Time
Ultimate Carjunky
/ Moderator
Apr 10, 2010, 6:38 AM
Post #4 of 7
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Re: 04 VW Beetle Code Problems
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Those aftermarket cats are likely the problem. You need to use the OEM converter.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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broknindarkagain
New User
Apr 10, 2010, 6:50 AM
Post #5 of 7
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Re: 04 VW Beetle Code Problems
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Thats what I was thinking about the cats. My next step was to try a direct fit. But what are your thoughts on "P0411 16795 Secondary Air Injection System Incorrect Flow Detected". This code didn't come up until after I started doing repairs
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Hammer Time
Ultimate Carjunky
/ Moderator
Apr 10, 2010, 9:10 AM
Post #6 of 7
(5788 views)
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Re: 04 VW Beetle Code Problems
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That could also be due to the cats as the PCM monitors that through changes in the 0/2 readings. Fix the cat problem first.
Just being a "direct fit" won't necessarily solve your problem. Aftermarket cats just won't work in some situations.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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broknindarkagain
New User
Apr 10, 2010, 10:02 AM
Post #7 of 7
(5781 views)
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Re: 04 VW Beetle Code Problems
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I'll give it a shot and see what happens. I'll post and let you know. Thank you for the help
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