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Old 02-22-2016, 12:39 AM
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Join Date: Feb 2016
Location: Bay City, MI
Car: '99 540I SPORT
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Default Cannot communicate with BUS

99 540ia started having trans fail safe mode come on occasionally so i got some diag cables.

I have DIS, INPA and Bmw scanner. Initially all of these could communicate with the car via pac man under hood.

In the beginning was inconsistent trans codes. Then lots of random codes and bus communication issue... Now no communication whatsoever.... The cables and software are still setup correctly and work on my e46...

How can I diagnose? The car still starts and runs but goes into limp mode are driving for a few minutes...

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