GM Truck Club
THE PREMIER CHEVY TRUCK & SUV FORUM
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 2 of 2
  1. #1

    Default TO405 trouble code. egr already replaced TWICE! HELP!!

    I have a 1998 Tahoe V-8 Vortec, button control w/auto4x4, auto, FULLY loaded 189,000 miles
    everything about it is wonderful EXCEPT my check engine light is on and code TO405 is all that comes up on the scanner. I have replaced the EGR twice but does not help. if you have any ideas/suggestions please let me know I will try ANYTHING!!!!Click image for larger version. 

Name:	tahoe.jpg 
Views:	95 
Size:	60.1 KB 
ID:	35426

  2. #2
    Sr. Apprentice
    Join Date
    Nov 2008
    Location
    Endicott, NY
    Posts
    65

    Default

    Did you follow the proper diagnostic procedure or did you just replace the EGR valve? The code only tells you where to look it doesn't tell you what part has failed. You have to follow the procedure to find the failing component. The attachments cover the diagnostic procedure including a schematic to be used.


    98 Tahoe DTC P0405 Exhaust Gas Recirculation P1.doc
    98 Tahoe DTC P0405 Exhaust Gas Recirculation P2.doc

    Bill

Similar Threads

  1. trouble code 171
    By snascar29 in forum Chevy Colorado Forum (GMC Canyon)
    Replies: 1
    Last Post: 12-10-2009, 06:38 PM
  2. trouble code
    By challutz in forum Chevy C/K Truck Forum
    Replies: 2
    Last Post: 11-21-2009, 07:37 AM
  3. Trouble code
    By T1743 in forum GM Diesel & DuraMax
    Replies: 1
    Last Post: 11-21-2009, 02:11 AM
  4. Trouble Code 0452
    By trapper_canada in forum Chevy Silverado Forum (GMC Sierra)
    Replies: 3
    Last Post: 11-13-2009, 08:49 AM
  5. Trouble Code P0513
    By canislupis69 in forum General Chevy & GM Tech Questions
    Replies: 2
    Last Post: 08-05-2009, 07:51 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •