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So found out today that dodge did a os flash on some of these trucks and you cant read them out flash them with pretty much anything. And if you do flash it with hpt or anything else you will have a no start. it gives you a checksum error after flashing. apparently they locked the pcm's down even more.. has anyone else had this issue, have you found the back door to this problem to get them unlocked or changing back to an older os software.
There is a good post on the EFILive forum about this. Essentially, once the new OS is flashed on the truck by the dealer, you are done (no way to tune it anymore). It is why I am hesitant to have the CP3 swap done. I want the CP3, but I do not want the OS flash. Hopefully I can just get the physical parts changed and leave the tuning to me.
Here is the link:
https://forum.efilive.com/showthread...ummins-Support
Here's the warning:Attachment 135253
is there anything we can do to revert the boot block back using kess or ktag??
Seen lots still tuneable after the OEM CP3 flash. Done some myself. Untuneable CM2450 with anything but HP Tuners after flashing with HP Tuners I have seen.Quote:
Originally Posted by jfreemanak
That is good to know Jim. Maybe I should just schedule the recall and see what happens. Though it would suck to lose tuning ability. Are you saying that on some CM2450 controllers, once they have been tuned with HP Tuners, they are unable to be tuned with other products?
Been my experience yes