Quote:
Originally Posted by deepblonde
Thank you for the update,
how did you figure out it was the DSC/ABS module? 
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It was an educated guess. When the car was hot, I couldn't communicate with any modules and everything was going haywire. When cold, I could at least connect to the car with ISTA, and could communicate with all of the modules except the DSC, which had the recurring 5A intermittent power loss failure. After googling, this is a common failure mode for the 5.7 DSC, so I sent it off to be rebuilt.