Mike "Wuzzy121". Rest in peace, brother

Go Back   Tacoma World Forums > Tacoma Garage > 4 Cylinder

Notices

please help p0401 code

Reply
 
Thread Tools Search this Thread
Old 06-12-2010, 06:39 AM   #1
gixxer1 [OP] gixxer1 is offline
Junior Member
gixxer1 is on a distinguished road
 
gixxer1's Avatar
Joined: Jan 2008, #4245
Gender: Male
Posts: 18
gixxer1's Tacoma Gallery
please help p0401 code

03 4x4 2.7L 5spd.......so i was driving the other day and got a check eng. light on p0401.......took it to the dealer and a master tech took a look....he said replace the egr valve and vsv solinoid . so i did this and the light came back on.

prior to replacing these parts i checked out the egr with a vacuum gauge(applied vacuum and engine wanted to stall, so i figured it was ok)
removed the vsv and applied vacuum then actuated it with battery voltage , vacuum released- figured that was ok too)
looked inside egr to exhaust manifold tube and its completely clear!....wtf!

anybody have this problem?

thank you
  Reply With Quote
Old 06-12-2010, 06:03 PM   #2
Member
swdockter is on a distinguished road
 
swdockter's Avatar
Joined: Apr 2010, #34669
Location: Northwest Burbs, IL
Gender: Male
Posts: 56
swdockter's Tacoma Gallery
Talking Ya, me too

Quote:
Originally Posted by gixxer1 View Post
03 4x4 2.7L 5spd.......so i was driving the other day and got a check eng. light on p0401.......took it to the dealer and a master tech took a look....he said replace the egr valve and vsv solinoid . so i did this and the light came back on.

prior to replacing these parts i checked out the egr with a vacuum gauge(applied vacuum and engine wanted to stall, so i figured it was ok)
removed the vsv and applied vacuum then actuated it with battery voltage , vacuum released- figured that was ok too)
looked inside egr to exhaust manifold tube and its completely clear!....wtf!

anybody have this problem?

thank you

lmao, I have the same code right now. Hope we can find someone here with the same issues and got them fixed.
  Reply With Quote
Old 06-13-2010, 06:32 PM   #3
gixxer1 [OP] gixxer1 is offline
Junior Member
gixxer1 is on a distinguished road
 
gixxer1's Avatar
Joined: Jan 2008, #4245
Gender: Male
Posts: 18
gixxer1's Tacoma Gallery
ttt
  Reply With Quote
Old 06-13-2010, 08:51 PM   #4
Senior Member
nagelg is a glorious beacon of lightnagelg is a glorious beacon of lightnagelg is a glorious beacon of lightnagelg is a glorious beacon of lightnagelg is a glorious beacon of lightnagelg is a glorious beacon of light
 
nagelg's Avatar
Army: 173rd Airborne, Pathfinder, MACV
Name: George
Joined: Mar 2008, #5184
Location: Northern Wisconsin
Age: 68
Gender: Male
Posts: 444
nagelg's Tacoma Gallery
Send a message via Yahoo to nagelg
Try this guys:
http://www.tacomaworld.com/forum/2nd...ml#post1290647
  Reply With Quote
Old 06-14-2010, 06:17 AM   #5
Member
swdockter is on a distinguished road
 
swdockter's Avatar
Joined: Apr 2010, #34669
Location: Northwest Burbs, IL
Gender: Male
Posts: 56
swdockter's Tacoma Gallery
Quote:
Originally Posted by nagelg View Post
Thanks bud, great list of codes. Only problems is "P0401 Exhaust Gas Recirculation Flow Insufficient Detected" is giving this moron (me) enough to go by. How about a few more details. There are vacume chambers, vsv and other items that are included in the EGR flow....
  Reply With Quote
Old 06-14-2010, 03:25 PM   #6
Senior Member
nagelg is a glorious beacon of lightnagelg is a glorious beacon of lightnagelg is a glorious beacon of lightnagelg is a glorious beacon of lightnagelg is a glorious beacon of lightnagelg is a glorious beacon of light
 
nagelg's Avatar
Army: 173rd Airborne, Pathfinder, MACV
Name: George
Joined: Mar 2008, #5184
Location: Northern Wisconsin
Age: 68
Gender: Male
Posts: 444
nagelg's Tacoma Gallery
Send a message via Yahoo to nagelg
Yer talking to a dummy here bud. I can sure fix a truck that don't have a computer, try me on carburetors, distributers and points and I'm ok. Throw a "code" at me and I'm,,,, WTF??????

There some pretty smart people on here (Chris 4X4 and a bunch more) who can answer your questions....good luck.
  Reply With Quote
Old 06-14-2010, 03:30 PM   #7
:POOPCORN:
98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed
 
98tacoma27's Avatar
Marines:
Name: Ben
Joined: Dec 2008, #11714
Location: Beech Creek
Gender: Dude
Posts: 48,263
98tacoma27's Tacoma Gallery
http://www.ncttora.com/fsm/2003/Repa...egrsy/insp.pdf

Replace that, after you double check for loose vacuum lines

http://www.ncttora.com/fsm/2003/Repa...e3/cip0401.pdf
  Reply With Quote
Old 06-14-2010, 03:33 PM   #9
:POOPCORN:
98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed
 
98tacoma27's Avatar
Marines:
Name: Ben
Joined: Dec 2008, #11714
Location: Beech Creek
Gender: Dude
Posts: 48,263
98tacoma27's Tacoma Gallery
  Reply With Quote
Old 06-14-2010, 05:15 PM   #10
gixxer1 [OP] gixxer1 is offline
Junior Member
gixxer1 is on a distinguished road
 
gixxer1's Avatar
Joined: Jan 2008, #4245
Gender: Male
Posts: 18
gixxer1's Tacoma Gallery
Thank you Ben so much!
I'll mess with it tomorrow.......
Do you have a vacuum diagram also?
  Reply With Quote
Old 06-14-2010, 07:02 PM   #11
:POOPCORN:
98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed
 
98tacoma27's Avatar
Marines:
Name: Ben
Joined: Dec 2008, #11714
Location: Beech Creek
Gender: Dude
Posts: 48,263
98tacoma27's Tacoma Gallery
This has one for the system you are trouble shooting.
http://www.ncttora.com/fsm/2003/Repa...e3/cip0401.pdf
There should also be one on the hood or radiator support
  Reply With Quote
Old 06-18-2010, 01:19 PM   #12
gixxer1 [OP] gixxer1 is offline
Junior Member
gixxer1 is on a distinguished road
 
gixxer1's Avatar
Joined: Jan 2008, #4245
Gender: Male
Posts: 18
gixxer1's Tacoma Gallery
Quote:
Originally Posted by 98tacoma27 View Post
This has one for the system you are trouble shooting.
http://www.ncttora.com/fsm/2003/Repa...e3/cip0401.pdf
There should also be one on the hood or radiator support
the vacuum ports on top of the throttlebody seem to be the problem......
two are clogged so i blew them out and checked for vacuum with a gauge.......i have vacuum now and i reset light so now i will post eng. light results in a few days.
  Reply With Quote
Old 06-21-2010, 04:37 PM   #13
gixxer1 [OP] gixxer1 is offline
Junior Member
gixxer1 is on a distinguished road
 
gixxer1's Avatar
Joined: Jan 2008, #4245
Gender: Male
Posts: 18
gixxer1's Tacoma Gallery
no light yet, its been about 75-100 miles......it was the two throttlebody ports 2nd/3rd from butterfly opening on top.
  Reply With Quote
Old 06-22-2010, 05:05 AM   #14
:POOPCORN:
98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed
 
98tacoma27's Avatar
Marines:
Name: Ben
Joined: Dec 2008, #11714
Location: Beech Creek
Gender: Dude
Posts: 48,263
98tacoma27's Tacoma Gallery
  Reply With Quote
Old 06-22-2010, 10:27 PM   #15
Senior Member
005Tacoma is one of the sharper tools in the shed005Tacoma is one of the sharper tools in the shed005Tacoma is one of the sharper tools in the shed005Tacoma is one of the sharper tools in the shed005Tacoma is one of the sharper tools in the shed005Tacoma is one of the sharper tools in the shed005Tacoma is one of the sharper tools in the shed005Tacoma is one of the sharper tools in the shed005Tacoma is one of the sharper tools in the shed005Tacoma is one of the sharper tools in the shed005Tacoma is one of the sharper tools in the shed
 
005Tacoma's Avatar
Name: Mike
Joined: Jun 2008, #7179
Location: Macon Georgia
Age: 37
Gender: Male
Posts: 565
005Tacoma's Tacoma Gallery
Quote:
Originally Posted by gixxer1 View Post
03 4x4 2.7L 5spd.......so i was driving the other day and got a check eng. light on p0401.......took it to the dealer and a master tech took a look....he said replace the egr valve and vsv solinoid . so i did this and the light came back on.

prior to replacing these parts i checked out the egr with a vacuum gauge(applied vacuum and engine wanted to stall, so i figured it was ok)
removed the vsv and applied vacuum then actuated it with battery voltage , vacuum released- figured that was ok too)
looked inside egr to exhaust manifold tube and its completely clear!....wtf!

anybody have this problem?

thank you
P0401 Exhaust Gas Recirculation Flow Insufficient Detected
  Reply With Quote
Old 10-09-2010, 05:59 PM   #16
Junior Member
hktran is on a distinguished road
Name: KT
Joined: Oct 2010, #44439
Location: LA
Gender: Male
Posts: 1
hktran's Tacoma Gallery
bad vacuum modulator

i had this same code for over a year, it would come on and off so i never addressed it. now it just stayed on, and i have dmv reg at the end of the month. spent the afternoon diagnosing.
found there was vacuum off the throttle body(to port P), but nothing after the vacuum modulator(out of port Q).
i was pretty sure this was the culprit, decided to crack open the modulator to see. sure enough, the rubber membrane was broken/cracked.
Attached Thumbnails
please help p0401 code-photo1121.jpg  
  Reply With Quote
Old 05-23-2011, 04:20 PM   #17
Senior Member
Racerboy221 will become famous soon enoughRacerboy221 will become famous soon enough
 
Racerboy221's Avatar
Army: Counter Intelligence at NSA
Name: Bill
Joined: Mar 2011, #53292
Location: Litchfield Park, AZ
Age: 51
Gender: Male
Posts: 432
Racerboy221's Tacoma Gallery
Send a message via Yahoo to Racerboy221
I get the P0402 code from time to time as well. I just reset it using the OBD-II computer I keep under the seat and continue driving. The cost of replacing this item at retail is just stooopid expensive. too!
  Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Need some help Code P0402 Tacito 1st Gen. Tacomas 16 08-18-2012 05:21 AM
what does this code mean? ironman_jon 2nd Gen. Tacomas 1 01-14-2011 09:00 PM
P0401 EGR Code, Buzzing Charcoal Canisters, and No Starts... FML. mixx2001 Technical Chat 1 11-13-2010 12:42 PM
CHECK ENGINE LIGHT p0401 jimmydean 1st Gen. Tacomas 1 11-03-2010 08:13 PM
Code Help !!!! WorkTruck 1st Gen. Tacomas 0 12-29-2008 08:06 PM


Copyright © 2014 Tacoma Forum. Tacoma World is not owned by, or affiliated with Toyota Motor Corporation.