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Hey guys, not sure whats going on but after I updated hptuners with the latest download and tuned the next truck I'm getting these codes:
U0100
U0101
U0137
U0121
U0401
U0415
all to do with loosing communication with ecm/tcm/trailer brakes/abs and invalid data.
I've tuned 60+ vehicles with hptuners and never had this happen before,
any ideas why this happening?
this truck is a 2014 gmc with the 6.2 and 6pd
Have you tried flashing back the original Tune?
Do you have a different scanner to try to clear codes? Communicate with the individual modules, run a few bidirectional tests?
thanks for the reply, I refreshed the same tune and afterwards the codes came back, cleared them with the scanner twice but now seems to be ok
Well guys, having the same issue again but with a 2007 gmc 6.0, same communication issues and now also says invalid application key when i try to flash or pull the tune off.
anyone have the previous version before the 4.8.7 was released?
ever since that update i got nothing but issues
So just an update, got an older version, pulled the tune again, reflashed it back (this was the stock tune) and same thing, no start.
he brought the truck to a dealer and they got it going, said something about the security system was not communicating anymore and had to reset it.
now he still wants me to put the modified tune back on but dont want to have this happen again.
what can i do to make sure this doesnt happen anymore?
Jamie F
I have a similar issue but only comm issues with EBC - ECU U0401 and 0415 so the car starts but has EBC issues.
Suspect could be a similar issue to what you had experienced.
Did you flash the modified tune back in without issue? What was the fix to this problem?
Quote:
Originally Posted by MarkR8
Hey Mark,
what ended up fixing it was unplugging the bcm and plugging it back in, was kinda strange to me but it seems to be working
Was that after flashing the modified file back in?Quote:
Originally Posted by Jamie F
that was with the stock file on it, then afterwards reflashed with the modified fileQuote:
Originally Posted by MarkR8