 insufficient EGR flow, P0401 |
 Mar 18, 2010 - 8:08 PM
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Enthusiast  Joined Jan 7, '10 From Greenville Ohio Currently Offline Reputation: 0 (0%)  |
So my 98 celica gt has been throwin me this code for about 2 weeks now and its not staying away.
I have cleaned the port on the throttle body, cleaned the vacumm line ports on the throttle body, replaced egr valve, tested the vacumm modulator (item to the left of the egr with a filter in it), and tested the vsv which is a purge solenoid on the lower part of then engine (ecm tell it when to allow vacumm to open egr i did all of this and yet i keep getting the code now my last suspects are either the map sensor or ecm now with the map sensor im sure it would run funny and all if it went bad, but the car runs fine and ecms dont go bad often so can any one help me, im taking any suggestion at this point. |
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Mar 18, 2010 - 8:34 PM
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 Enthusiast Joined Apr 28, '09 From York pa Currently Offline Reputation: 3 (100%) |
did you disconnect the battery after you did all dat to erase the code and drive around
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Mar 18, 2010 - 8:37 PM
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Enthusiast Joined Jan 7, '10 From Greenville Ohio Currently Offline Reputation: 0 (0%) |
ive cleared the code after every time i try to fix it, and it comes right back on, now i just got done reading a thread about replacving the modulator, so i think thats my next step.
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Mar 18, 2010 - 10:20 PM
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Enthusiast Joined Dec 8, '03 From Lancaster CA Currently Offline Reputation: 6 (100%) |
im getting both codes at the same time, excessive and insufficient. its very fustrating.
-------------------- 2001 Celica GT-S Turbo
1997 Supra TT 6speed 1997 Celica 3MZ/1MZ swap 1990 Celica All-Trac |
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Mar 18, 2010 - 10:26 PM
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Enthusiast Joined Jan 7, '10 From Greenville Ohio Currently Offline Reputation: 0 (0%) |
I actaully seen something for both codes at the same time on all data, if you have ever heard of that. Ill read up on it it and post what I find
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Mar 19, 2010 - 8:19 PM
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Enthusiast Joined Dec 8, '03 From Lancaster CA Currently Offline Reputation: 6 (100%) |
please do, its very fustrating!
-------------------- 2001 Celica GT-S Turbo
1997 Supra TT 6speed 1997 Celica 3MZ/1MZ swap 1990 Celica All-Trac |
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Mar 19, 2010 - 9:12 PM
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 Enthusiast Joined Mar 8, '08 From Orlando, Florida Currently Offline Reputation: 14 (100%) |
the egr is a pain to diagnose. My CEL has been on and off with insufficient egr flow. It doesn't seem to affect anything, so I just let it be.
However, my specific problem seems to relate to the fuel gauge reading.... strange, but true. Oh well. good luck with your hunt for the culprit guys. -------------------- ◊◊◊ My F/S Thread! ◊◊◊
QUOTE (14:19:21) Daniel: That was a JDM hole in the side of the box too. There was so much JDM trapped inside that box that they couldn't contain it, so they had to put a JDM hole in the box to let the JDM out. QUOTE Ferdi says (11:29) No, it looks like a hooker put her acid vag on your hood. Acid vag = bigger problem than a few dings. |
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