<![CDATA[OBDII Question]]>Hooked up the reader at work today and the code was P0401 (exhaust gas flow insufficient detected)...Can anyone clarify that for me? The car is a 95 neon.

]]>https://fargostreet.com/topic/10136/obdii-questionRSS for NodeThu, 28 May 2026 04:38:15 GMTWed, 11 Apr 2007 00:30:45 GMT60<![CDATA[Reply to OBDII Question on Wed, 18 Apr 2007 13:33:25 GMT]]>

SPANISH-RICE;163579 wrote:
lol @ you ryan

only way to know 100% whats wrong with it 🙂

]]>https://fargostreet.com/post/154526https://fargostreet.com/post/154526Wed, 18 Apr 2007 13:33:25 GMT<![CDATA[Reply to OBDII Question on Wed, 11 Apr 2007 14:51:37 GMT]]>lol @ you ryan

]]>https://fargostreet.com/post/153471https://fargostreet.com/post/153471Wed, 11 Apr 2007 14:51:37 GMT<![CDATA[Reply to OBDII Question on Wed, 11 Apr 2007 14:41:37 GMT]]>heres the diagnostic flow chart, get busy.

42376020.gif
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42376021.gif

]]>https://fargostreet.com/post/153470https://fargostreet.com/post/153470Wed, 11 Apr 2007 14:41:37 GMT<![CDATA[Reply to OBDII Question on Wed, 11 Apr 2007 13:59:11 GMT]]>the ecu isnt going to monitor back pressure in the exhuast. it does how ever watch pressure differances in the EGR system. and if it doesnt run shitty its not going to be a plugged cat then it would just fall on its face.
does it sound like it might have some detonation if you get on it at all? it doesnt need to be running bad to be detonating but with bad egr flow you might be able to hear some.

]]>https://fargostreet.com/post/153466https://fargostreet.com/post/153466Wed, 11 Apr 2007 13:59:11 GMT<![CDATA[Reply to OBDII Question on Wed, 11 Apr 2007 02:05:13 GMT]]>Check all the stuff with emmissions and also check your cat converter...it my very well be plugged.

]]>https://fargostreet.com/post/153370https://fargostreet.com/post/153370Wed, 11 Apr 2007 02:05:13 GMT<![CDATA[Reply to OBDII Question on Wed, 11 Apr 2007 00:50:55 GMT]]>As far as I can tell its just throwing a code....car itself runs pretty smooth... I did clear the code afterwards and on my way home it came back on after 2 or 3 miles...

]]>https://fargostreet.com/post/153347https://fargostreet.com/post/153347Wed, 11 Apr 2007 00:50:55 GMT<![CDATA[Reply to OBDII Question on Wed, 11 Apr 2007 00:44:49 GMT]]>is it just throwing a code or is it running rough? check your EGR valve ports and operation.

]]>https://fargostreet.com/post/153342https://fargostreet.com/post/153342Wed, 11 Apr 2007 00:44:49 GMT