2017 Buick LaCrosse U0073 code

bnwk65

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Buick Ownership
2017 Buick Lacrosse premium awd
Hoping someone may have had this happen and can tell me where to look, my DIC flashed service suspension and service brake assist one after the other and then check engine light popped on and stayed on. So I bought a Fixd brand reader at Best Buy and found the code U0073 Control module communication bus off, The check engine light after being wiped out by the reader has not come back on and everything seems to be fine, has anybody had this happen to them and what was the result? Thank you for any responses
 
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