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Discussion Starter · #1 ·
hello all,
my cousins 96 corolla threw this p0401 insufficient egr flow .... whats must be replaced? sensor or valve? thanks
 

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corolla
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Probably neither. EGR's frequently clog up from oil deposits. Remove and clean out all the crud and you should be able to make that code go away.

-SP
 

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Discussion Starter · #3 ·
how would i remove it? plug and play? how many bolts and etc... thanks and lastly w what should i clean it? and how to reset check engine light?
 

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Discussion Starter · #4 ·
nvm took it out already... very simple..... its tight back there but its possible...... so i cleaned it i just sprayed it w brake cleaner had some in the garage at the moment and as for the modulator i plugged it in the in the compressor and it seemed as something came out cause at first air wouldnt go through after 3 seconds it did..... cleared the engine code..... lets see if this works.... THANKS!!!
 

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corolla
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Thats all it takes.... just a little maintenance. For better cleaning get some Berrymans carb cleaner. It dissolves the crud a LOT better than brake cleaner.

-SP
 

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Discussion Starter · #6 ·
ok the code came back....how do i clean it. do i spray it inside the 2 holes in the valve? and as for the modulator how do i know if its still working?
 

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Discussion Starter · #8 ·
how to you test egr modulator? im a RN student have very little time on my hands....... i took old one out and hooked up compressor to it... and hardly any air came out....?
 

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corolla
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If you need hand holding more than whats revealed here I dont think you should be working on your car.

-SP
 

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Discussion Starter · #11 ·
haha ok.... hand holding..ok.... i swapped my old car went from a LS to a fully built h2b kit.... on a acura..... reason im asking cause my car doesnt have EGR. egr was only made to reduce performance and smog emissions....... but to continue my story went to a mechanic and 100 to diagnose the wrong part...... so im just going to replace the modulator and take it from there .
thanks toyota nation!!
ohs and here is a pic of my old celica b4 i bought an integra......

 
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