Results 1 to 5 of 5

Thread: PO234 Engine Overboost Control

Hybrid View

Previous Post Previous Post   Next Post Next Post
  1. #1
    Join Date
    Feb 2009
    Location
    Nevada
    Posts
    26

    Default PO234 Engine Overboost Control

    2001 D-Max. I am experiencing PO234 when towing my RV (10K lbs) uphill. I have had the boost monitor replaced. The truck does fine until I near the shift point for 5th gear. My boost gauge reads 15 - 17 lbs. The throttle is removed until the truck slows to around 40 mph.

    I have had the Code PO234 several times and it is the only Code I get. I had a PCM reflash in 2004, which solved this problem or one very much like it. All intake connections have been verified as good.

    Would another reflash of the PCM be helpful? Is there a newer version of software for the PCM or can it revert somehow, back to a prior level (Glitch)? What else should I look for or do to solve this pesky event?

  2. #2
    Join Date
    Mar 2000
    Location
    Loyal WI US
    Posts
    10,792

    Default

    The 2001 is just an odd duck. Some get these codes with a limp mode, some just limp and no code and some have no issues. Some get these issues popping up later in life. The best I can say is that some of these trucks are right on the limit of the OE parameters.

    The answer is quite simple and that is in non OE programming updates. I have done quite a few of these 2001's and have yet to have any repeat issues. I just did one locally here this morning.
    Kennedy Diesel-owner
    More than just a salesman-I use and test the products that I sell on a daily basis!
    Superflow Lie Detector in house
    2002 Chev K2500HD D/A CC Long LT 11.77@ 124mph at 7700# fuel only-e.t. needs help
    2005 Chev K3500SRW D/A CC Long LT(SOLD)
    2007 Chev K2500 Classic EC Short LT (Sold)
    2012 GMC K3500SRW D/A CC Long LTZ Happy Birthday to me! Built 1 working day after my birthday and delivered 7 days later.
    2016 GMC K3500SRW D/A CC short LTZ

    Custom tuning in house using EFI Live tuning software!

  3. #3
    Join Date
    Feb 2009
    Location
    Nevada
    Posts
    26

    Default Thanks Kennedy

    What is the best way for me to locate someone with the knowledge and equipment to do the needed "non OE" program revisions? I am in the Yuma, AZ area now and will soon be towing my RV to the Las Vegas area.

  4. #4
    NutNbutGMC Guest

    Default

    Quote Originally Posted by TomJ01 View Post
    What is the best way for me to locate someone with the knowledge and equipment to do the needed "non OE" program revisions? I am in the Yuma, AZ area now and will soon be towing my RV to the Las Vegas area.
    Click on the "Kennedy Diesel" link in Kennedy's signature line (above). He can assist in most cases.

  5. #5
    Join Date
    Mar 2000
    Location
    Loyal WI US
    Posts
    10,792

    Default

    On my web site click on Kennedy Custom.
    Kennedy Diesel-owner
    More than just a salesman-I use and test the products that I sell on a daily basis!
    Superflow Lie Detector in house
    2002 Chev K2500HD D/A CC Long LT 11.77@ 124mph at 7700# fuel only-e.t. needs help
    2005 Chev K3500SRW D/A CC Long LT(SOLD)
    2007 Chev K2500 Classic EC Short LT (Sold)
    2012 GMC K3500SRW D/A CC Long LTZ Happy Birthday to me! Built 1 working day after my birthday and delivered 7 days later.
    2016 GMC K3500SRW D/A CC short LTZ

    Custom tuning in house using EFI Live tuning software!

Posting Permissions

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