Control module code U0073

2011 GMC ACADIA
67,000 MILES • 3.6L
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ARIV
  • MEMBER
  • 1 POST
Starts and then turns off, giving the code U0073.
Mar 17, 2018 at 6:18 PM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
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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Mar 19, 2018 at 11:58 AM
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