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Could a p0401 Code cause a p0300 code?

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Old Apr 27, 2010, 09:08 PM
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Could a p0401 Code cause a p0300 code?

Cuz ive been getting this p0300 code for over a year now and i just recently found out it was coding for the p0401 also. Could it be the cause??
Old Apr 28, 2010, 07:13 PM
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Old Apr 28, 2010, 07:18 PM
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Not necessarily. One of your hoses popped off of your EGR. Check behind/under the intake manifold and you'll see 2 hoses. You can use some zipties to get them snug.

For the P0300s - go to your local tuner and have them disable it. I've had no codes since...
Old Apr 28, 2010, 07:21 PM
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How do you disable it??
Old Apr 28, 2010, 07:24 PM
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A pro tuner will know how to disable it. Or you can search the forums. 0300 is a known bug for evo 8s
Old Apr 28, 2010, 08:49 PM
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Well i have searched on how to get rid of it and most people say to goto the dealership to get a reflash, but then ill lose my current tune. Can anyone offer me a link as to how to disable it?
Old Aug 3, 2010, 03:34 PM
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bump

ive had the P0401 and P0300 code for a while now. i havent searched the topic well enough yet but after reading this thread, i hope it solution isn't getting it re-tuned and losing current tune
Old Aug 3, 2010, 06:04 PM
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The dealer reflash may have fixed a few car's P0300 code but for most cars it did nothing. In other words, not a good choice.

The real fix is to have a tuner turn it off. They can do this without touching any of the rest of your tune.
Old Aug 3, 2010, 07:55 PM
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^ A lot of us have been a victim of this but you can fix it yourself, HERE.
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