What does this code mean? 16785 (P0401) Exhaust Gas Recirculation Flow Insufficient Detected

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Old 10-27-2003, 01:50 PM
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Zha
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Default What does this code mean? 16785 (P0401) Exhaust Gas Recirculation Flow Insufficient Detected

thankx!
Old 10-27-2003, 01:55 PM
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Default Means youve got a clogged EGR passage and/or...

A faulty EGR valve.
Old 10-27-2003, 01:57 PM
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Zha
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Default Re: Means youve got a clogged EGR passage and/or...

Thankx! Is there a way to clean the EGR (like the ISV) or am I better off just buying a new one?

Mark
Old 10-27-2003, 02:16 PM
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JWG
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Default Read though the pages of this forum . . .

It's pretty straight forward to clean the EGR tube. However, it's a bit tedious. You may use some EGR/TB/Carb cleaner and a braided cable with a drill to clean it out.

Sometimes its the valve that has the restriction; other times, you will find the passage in the intake manifold has become blocked.

So, do not buy anything until you clean all the EGR passages from the exhaust manifold to the intake manifold out first.
Old 10-27-2003, 03:00 PM
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Default Re: Read though the pages of this forum . . .

my website has a procedure posted. Link below
Old 10-27-2003, 03:16 PM
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Zha
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Nice site, thanks!
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