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Old 09-23-2022, 04:31 PM   #4
991.1le
 
Drives: 2018 SS 1LE
Join Date: Dec 2020
Location: Chino, CA
Posts: 20
Quote:
Originally Posted by Vtor_ZL1 View Post
Sure it's not just dead or near dead battery ?
Yeah tried a couple different know good batteries with the same result.

Quote:
Originally Posted by ctrlz View Post
A couple of links which may help. There is a note about one of the sensors shorting to ground and causing all the other modules which rely on a 5V reference to go "off-line."
https://www.underhoodservice.com/ecm...cation-issues/
https://rustyautos.com/obd-wont-connect-to-ecu/
Thanks for the links! Iím thinking itís gotta be something along those lines. Right now I have it narrowed down to all devices on the high speed GMLAN. All of the modules that communicate on the low speed network are talking just fine.
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