Results 1 to 10 of 14

Thread: $06FF Checksum Failure

Threaded View

Previous Post Previous Post   Next Post Next Post
  1. #4
    Join Date
    Feb 2019


    I know this thread is old but I'm in dire trouble. I am working on a 2010 Chevy 2500 6.0L vin 1GC4KXBG3AF147376 OS:12636005.
    I made a copy of the original tune. Then disabled the downstream O2s in the DTC type n mil. When I did the full flash, at the very end I got the checksum fail $06FF. Now the truck will not start
    Nothing I do allows me to flash the computer and now 7.5 scan won't recognize the E38. There is no checksum fail parameter.
    Where do I find the checksum patch or how do I fix this. Thanks
    Attached Files Attached Files

Similar Threads

  1. Checksum $06FF
    By autronika in forum E39, E80, E82 & E92 SIDI ECM's
    Replies: 11
    Last Post: May 27th, 2019, 02:45 AM
  2. Checksum $06FF
    By autronika in forum E37, E38 & E67 PFI ECM's
    Replies: 2
    Last Post: December 5th, 2016, 11:10 AM
  3. 06FF Checksum Failure on E38 PCM for 06 Z06
    By injected in forum Gen IV V8 Specific
    Replies: 4
    Last Post: April 1st, 2015, 08:58 AM
  4. T43 TCM code $06FF: checksum failure
    By 400ss in forum 6 speed/8 speed RWD/FWD Transmission Tuning (incl T43, T76, T87)
    Replies: 11
    Last Post: August 15th, 2014, 10:26 AM
  5. Replies: 2
    Last Post: July 17th, 2012, 04:27 PM

Posting Permissions

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