Control module code U0073

Tiny
ARIV
  • MEMBER
  • 2011 GMC ACADIA
  • 3.6L
  • 67,000 MILES
Starts and then turns off, giving the code U0073.
Saturday, March 17th, 2018 AT 6:18 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,959 POSTS
Hello,

This codes mean bus A is not working which is the communication between computers is not working. This could be because a fuse let go or the PCM or BCM is out and needs to be replaced. Lets start by checking the fuses.

Here is a guide to help us get started:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the diagrams (below).

Please let us know what you find. We are interested to see what it is.

Cheers, Ken
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Monday, March 19th, 2018 AT 11:58 AM

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