Need help with a check engine code.
08-05-2004, 08:50 PM
#1
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Thread Starter
Need help with a check engine code.
i have a check engine light on and it comes up with a P0401. (Insufficiant egr flow. needs egr ports cleaned)
does any one know what the servicing of this code reqires? ie...what do i have to do to fix this? take apart the intake??? any instructions would be appreaciated.
does any one know what the servicing of this code reqires? ie...what do i have to do to fix this? take apart the intake??? any instructions would be appreaciated.
08-05-2004, 09:40 PM
#2
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According to the service manual:
1. Reset the PCM
2. Test drive under the following conditions:
- Without any electrical load
- Decelerate from 55 mph (88 km/h) for at least 5 sec.
3. Check the Temporary DTC with the scan tool.
Is Temporary DTC P0401 indicated?
YES - Clean the intake manifold EGR port with carburetor cleaner. Clean the passage inside the EGR valve with carburetor cleaner or replace the EGR valve.
NO - Intermittent failure, go to step 3.
4. Turn the ignition switch OFF.
5. Disconnect the EGR valve 6P connector.
6. Connect the battery positive terminal to EGR valve connector terminal No. 4.
7. Start the engine and let it idle, then connect the battery negative terminal to EGR valve connector terminal No. 6.
Did the engine stall or run rough?
YES - Intermittent failure, system is OK at this time.
NO - Clean the intake manifold EGR port with carburetor cleaner. Clean the passage inside the EGR valve with carburetor cleaner or replace the EGR valve.
2. Test drive under the following conditions:
- Without any electrical load
- Decelerate from 55 mph (88 km/h) for at least 5 sec.
3. Check the Temporary DTC with the scan tool.
Is Temporary DTC P0401 indicated?
YES - Clean the intake manifold EGR port with carburetor cleaner. Clean the passage inside the EGR valve with carburetor cleaner or replace the EGR valve.
NO - Intermittent failure, go to step 3.
4. Turn the ignition switch OFF.
5. Disconnect the EGR valve 6P connector.
6. Connect the battery positive terminal to EGR valve connector terminal No. 4.
7. Start the engine and let it idle, then connect the battery negative terminal to EGR valve connector terminal No. 6.
Did the engine stall or run rough?
YES - Intermittent failure, system is OK at this time.
NO - Clean the intake manifold EGR port with carburetor cleaner. Clean the passage inside the EGR valve with carburetor cleaner or replace the EGR valve.
08-05-2004, 10:19 PM
#3
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Thread Starter
thanks!
oh, does it say i need to remove the intake manifold to do any of the cleaning?
oh, does it say i need to remove the intake manifold to do any of the cleaning?
08-06-2004, 08:20 PM
#4
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Thread Starter
here are a few picks of why i was getting the code. the 2nd
2 last picture is just a little bit of what i pulled out of the first 2 pics.
2 last picture is just a little bit of what i pulled out of the first 2 pics.
08-06-2004, 09:10 PM
#5
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The quote I posted was the whole entry in the manual under DTC P0401. It says clean the EGR ports but it doesn't go into detail about how to do that in that section. I guess you're addressing it effectively anyway, the carbon build-up is probably what's giving you the code. Nice pics! I always wanted to know what was under that engine plate. Give us an update if this solved the code or not. Glad I could be of some help.
08-06-2004, 09:19 PM
#6
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Thread Starter
oh yea forgot to add the light went off.
thanx again for the help
thanx again for the help
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08-07-2004, 01:04 AM
#8
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Thread Starter
Originally Posted by Street Spirit
Wanna come do that for my car too?! :P No 'check engine' light in my case - but just so amazed at how much cleaner you've gotten it! 
oh and to answer your Question. if you came to me id help ya clean it!
08-07-2004, 09:04 AM
#9
Originally Posted by fsttyms1
yea after opening it up and seeing that crap all built up! i was like holy $hit! well its alot smoother running. and for most it would be a Very easy job. just unbolt the 10 or so bolts and pop the upper cover off to see if they have the build up. this is my 2nd time with this issue (its a known issue with honda because they have a kit to help eliminate the problem) 1 hour of your time and a cn of carb cleaner and you can clean the upper cover your self!
oh and to answer your Question. if you came to me id help ya clean it!
oh and to answer your Question. if you came to me id help ya clean it!
oh yeah --- is it really noticeable how much smoother the car runs? am seriously considering looking into this on my '99. what product did you use to clean it?
you'd help me out, eh?! ....hmmm...better start driving NOW!
08-07-2004, 09:48 AM
#11
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Originally Posted by Street Spirit
oh yeah --- is it really noticeable how much smoother the car runs? am seriously considering looking into this on my '99. what product did you use to clean it?
you'd help me out, eh?! ....hmmm...better start driving NOW!
you'd help me out, eh?! ....hmmm...better start driving NOW!
08-09-2004, 09:17 AM
#13
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Thread Starter
Originally Posted by Street Spirit
k... will head to the store to get some today... hoping i can clean mine too (if it needs it)
08-09-2004, 11:53 AM
#14
What year is your car? I assume its out of warranty since you are checking the codes yourself instead of the dealer ... I had my EGR ports cleaned by the dealer, they said it was a know issue and did it as warranty work. Unfortuanatly that did not take care of my issue. My issue is that it feels like a hicup when I crusing at 40mph. I now pass it off as my car deciding what gear to use at that speed.
Originally Posted by fsttyms1
i have a check engine light on and it comes up with a P0401. (Insufficiant egr flow. needs egr ports cleaned)
does any one know what the servicing of this code reqires? ie...what do i have to do to fix this? take apart the intake??? any instructions would be appreaciated.
does any one know what the servicing of this code reqires? ie...what do i have to do to fix this? take apart the intake??? any instructions would be appreaciated.
08-09-2004, 02:37 PM
#15
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Originally Posted by jpadilla
What year is your car? I assume its out of warranty since you are checking the codes yourself instead of the dealer ... I had my EGR ports cleaned by the dealer, they said it was a know issue and did it as warranty work. Unfortuanatly that did not take care of my issue. My issue is that it feels like a hicup when I crusing at 40mph. I now pass it off as my car deciding what gear to use at that speed.
08-09-2004, 07:05 PM
#16
Instructor
"2 last picture is just a little bit of what i pulled out of the first 2 pics."
Looks like the inside of my grill. Great illustration & explaination.
Years ago my 79 Toronado intake manifold looked like that. I sprayed it with oven cleaner, let it sit overnight, and hosed it off the next day. Looked like new.
Looks like the inside of my grill. Great illustration & explaination.
Years ago my 79 Toronado intake manifold looked like that. I sprayed it with oven cleaner, let it sit overnight, and hosed it off the next day. Looked like new.
09-14-2004, 01:57 AM
#17
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Wow..this is a very helpful thread. My car idles kinda rough in the morning...I'm thinking about doing this too. Do I need to drain the oil before doing this procedure? Any other advice/info before I do this? It was easy to take out the bolts right?
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