Search | Car Forums | Gallery | Articles | Helper | AF 350Z | IgorSushko.com | Corporate |
| Latest | 0 Rplys |
11-15-2004, 11:05 PM | #1 | |
AF Newbie
Join Date: Nov 2004
Location: Greensboro, North Carolina
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
|
P401 code
I have gotten a P401 code (EGR insufficient flow) on a 1998 Lumina. I removed the EGR valve and found the springed actuator was sticking, so I replaced the EGR valve. The code comes back within two drive cycles of clearing.
The car sometimes starts rough but runs ok after a few seconds. The mileage is 98,000. Any ideas? Thanks |
|
11-16-2004, 03:11 AM | #2 | |
AF Enthusiast
Join Date: Mar 2004
Location: Snellville, Georgia
Posts: 556
Thanks: 0
Thanked 0 Times in 0 Posts
|
Re: P401 code
Just fixed this on my neighbor's 96 cutlass, about 80k mileage. The passage from the valve to the intake is more than likely clogged, and its nothing a guitar string/coathanger and a shot of carb cleaner can't fix. Take you about an hour, be sure you have some rags and a shop vac handy. Fortunately, this fix costs nothing but some time, and it wouldn't hurt to clean it out, so even if it is something else (MAP sensor, in this case) you didn't spend any moolah on it.
|
|
11-16-2004, 03:50 PM | #3 | |
stupidity should hurt
Join Date: Aug 2004
Location: Flint, Michigan
Posts: 10,129
Thanks: 2
Thanked 22 Times in 22 Posts
|
Re: P401 code
I agree with Cad, sounds like a clogged egr passage.
|
|
11-16-2004, 03:58 PM | #4 | ||
AF Newbie
Thread starter
Join Date: Nov 2004
Location: Greensboro, North Carolina
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
|
Re: Re: P401 code
Quote:
Hope this works. Thanks |
||
11-16-2004, 04:25 PM | #5 | |
AF Enthusiast
Join Date: Mar 2004
Location: Snellville, Georgia
Posts: 556
Thanks: 0
Thanked 0 Times in 0 Posts
|
Re: P401 code
An additional note, you'll want an assistiant or something to block the throttle open. The passage is about an inch or two inside on the right wall of the intake..you can probably feel the hard crusty crap built up on the side with your finger. Sounds strange but be careful, it is sharp and can cut you (the buildup, that is)
|
|
01-09-2005, 03:48 PM | #6 | |
AF Newbie
Thread starter
Join Date: Nov 2004
Location: Greensboro, North Carolina
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
|
I have cleaned all the passages I can get to and no luck. I next replaced the MAP sensor and cleared the P401 code and the next time I started the car the code came back. Anymore suggestions or is it time for a professional?
Thanks |
|
01-09-2005, 06:00 PM | #7 | |
AF Enthusiast
Join Date: Mar 2004
Location: Snellville, Georgia
Posts: 556
Thanks: 0
Thanked 0 Times in 0 Posts
|
Re: P401 code
Start thinking about a $200 EGR valve then, if all the passages are cleaned and the wiring is OK.
|
|
01-09-2005, 10:05 PM | #8 | |
AF Newbie
Thread starter
Join Date: Nov 2004
Location: Greensboro, North Carolina
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
|
Re: P401 code
Thanks,
But I have replaced the EGR valve first and the code came back. The MAP sensor was the second part and no luck. |
|
|
POST REPLY TO THIS THREAD |
|
|