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    Thread: U0073, U0100, and U0101 codes

    1. #1
      What's wrong with my car?
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      U0073, U0100, and U0101 codes

      I noticed the above codes after changing my throttle body. I reseated the connector, but no changes. Physical inspection of wiring does not reveal anything. Any suggestions on what to check?
      U0101
      - Faulty Transmission Control Module (TCM)
      - TCM harness is open or shorted
      - TCM circuit poor electrical connection
      U0100
      - Faulty Engine Control Module (ECM)
      - ECM harness is open or shorted
      - ECM circuit poor electrical connection

      U0073
      Control Module Communication Bus OFF




    2. #2
      Should I keep it?
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      I got a lot of similar codes when I cleaned mine. Check to make sure you didn't accidentally unplug fuel injector #1.

    3. #3
      What's wrong with my car?
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      Did you ever resolve this issue?

      Quote Originally Posted by feather12comp View Post
      I noticed the above codes after changing my throttle body. I reseated the connector, but no changes. Physical inspection of wiring does not reveal anything. Any suggestions on what to check?
      U0101
      - Faulty Transmission Control Module (TCM)
      - TCM harness is open or shorted
      - TCM circuit poor electrical connection
      U0100
      - Faulty Engine Control Module (ECM)
      - ECM harness is open or shorted
      - ECM circuit poor electrical connection

      U0073
      Control Module Communication Bus OFF
      I have the same issue, did you ever resolve this issue with your car? What did you do to fix these codes? Thanks for your time!

    4. #4
      What's wrong with my car?
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      Quote Originally Posted by MicHaveo View Post
      I have the same issue, did you ever resolve this issue with your car? What did you do to fix these codes? Thanks for your time!
      I just had the throttle body replaced and my car is throwing the same code, do you have a fix?





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