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Discussion Starter · #1 ·
Hello to all,

I'm in a desparate need for help on this matter.

I have 98 accord LX V6 with 164k miles. Well, I took this car in for inspection and found out it failed. The reason was 1) P0401 code, and 2) check engine light bulb was missing.

I came home and took the dash out and discovered the check engine light bulb was physically taken out. Of course, when I bought this car used, the seller did not mention anything about the 'glitch.' I found out that he had a problem on the same issue and instead of fixing it, it mysteriously took care of the check engine light and managed to pass the state inspection before he sold the car to me. (shouldn't he be thrown in jail for this?)

Now I'm stuck with this problem and need to take care of it the right way to pass the inspection. I found out that O2 sensor and mass air flow sensor were replaced and I replaced EGR vavle a couple days ago. The result? The bright yellow 'check engine light.'! Can someone please help me on this? I am very tired of throwing money into this money pit and willing to get this thing fixed and move on with my life. I really appreciate any advice!

JL
 

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The car doesn't have a mass air flow sensor. A 1998 is speed density and only has a map sensor.

Replacing the EGR valve for a low flow code is putting the cart before the horse. Without testing to see if the valve actually works, and whether the port in the intake is blocked. A very, very, very common issue on V6s. (blocked port)

You need to pull the upper intake and manually clean out the port in the upper intake. Take off the EGR valve and clean the port from the lower intake to the EGR base in the water crossover.

Once you're done cleaning it out, clear the codes. Test drive the car and within the first 5 miles or so, get it over 60 and coast for at least 5 to 10 seconds, it will test the EGR system for flow during this time. The light should stay off as long as the ports are clear.

Do a search, there's several good threads with pics.
 

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Discussion Starter · #3 ·
Thank you for your help! I will try to get this thing cleaned and see if the check engine light stays off!
 

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hello to all,

i'm in a desparate need for help on this matter.

I have 98 accord lx v6 with 164k miles. Well, i took this car in for inspection and found out it failed. The reason was 1) p0401 code, and 2) check engine light bulb was missing.

I came home and took the dash out and discovered the check engine light bulb was physically taken out. Of course, when i bought this car used, the seller did not mention anything about the 'glitch.' i found out that he had a problem on the same issue and instead of fixing it, it mysteriously took care of the check engine light and managed to pass the state inspection before he sold the car to me. (shouldn't he be thrown in jail for this?)

now i'm stuck with this problem and need to take care of it the right way to pass the inspection. I found out that o2 sensor and mass air flow sensor were replaced and i replaced egr vavle a couple days ago. The result? The bright yellow 'check engine light.'! Can someone please help me on this? I am very tired of throwing money into this money pit and willing to get this thing fixed and move on with my life. I really appreciate any advice!

Jl
hey i was wondering if you got your check engine light off? I have the same problem with the same car, got my bro to clean out the egr valve and check eng light still on
 

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cleaning the valve will NOT fix a P0401
You need to remove the intake and clean the port in the upper manifold and the port from the lower manifold to the valve.
 

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I just replaced the EGR valve and the light is still on. How does one clear the codes?
BTW a continuity check of pin positions 1 and 2 showed open. That is why I went ahead and replaced the whole assembly and did not try to clean it.

tom
 

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EGR valve replacement

I just found the answer to my question. Once the EGR valve is replaced, one has to pull the #13 fuse (by the passenger side door opening) to reset the electronics. The "Check engine light" is no longer lit. It worked for me thank goodness.

Tom
 
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