Causes and Fixes U0073 Code: Control Module Communication Bus "A" Off
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- Опубліковано 10 жов 2023
- How to fix a U0073 Code: Control Module Communication Bus "A" Off
The U0073 means control modules and CAN Bus are not communicating correctly.
The CAN (Controller Area Network) is a protocol that allows the ECM, PCM, TCM, and ABS modules to communicate with each other.
Diagnosing a U0073 can be difficult and time-consuming.
Possible Causes of a U0073 Code:
Blown Fuse
Issues with Alternator Charging or Battery
Wiring Issue Such as Damaged Wires or Poor Connections
Faulty Control Module
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This gave me a better understanding of where I can start. Doing this job on my own and I am no mechanic. Fingers crossed.
You picked a hard one to start with and then maybe not if you luck out and can visually spot the issue.
Did you have any luck?
Update?
I’m sorry I am just seeing these comments not sure why. No I didn’t but it did get fixed kinda. I realized it was something electrical or battery issue type problem because it wasn’t throwing the same codes every time. A mechanic that works where i used to work looked at it and fixed it. Said it was my battery cable was bad and replaced it. She runs pretty good again but I am the type that don’t like and won’t drive my vehicle if I know something isn’t rite. I feel like if I do knowing something is wrong it will just make whatever it is worse and prob break some other stuff in the process. Ya know? The thing that is bothering me about her (my Tahoe lol) is there is a code that pops up on my dash and it only does it when I have been driving her for a longer time for instance I just came home from Austin/San Marcos & I drove strait home to Houston. A little passed half was it started popping up. It’s something to the affect of JDA62GHAKS 0 (not exactly that but basically. I know it’s gonna be something crazy. I can just imagine and I’m scared to death to be vehicleless.
I took my 15 silverado to the dealer twice said nothing is wrong with it I'm still working on it but i still have reduced power and the dang u0073 code for the ebcm its been a headache
👍🏽😎🏁🏁🏁 good Info!
I had this and found it easier to drive your vehicle into flood waters and call it good.
This code popped up on my car and I have Pontiac g6 2007 and I’m not sure on what that means honestly my car won’t let me drive over 10 miles
Olá amigo tenho uma Captiva 3.6 v6 apareceu esse código aí ela parou de acionar o câmbio o
My 2011 GMC SERRIA abs light on ,engine light on , traction control, brake light on , all fuses are good , what could be the problem
What was it?
Mine turned out to be high pressure fuel pump. Took it back to the dealership, only had it for a day. It was a 2018 gmc sierra 1500 base. Also had a bad transmission. What a shitty shitty brand
I have a u0073 and I can’t seem to get it I’ve tried to diagnose it but I might need some help lol 2007 Lexus ls460
did you ever resolve the issue?
I reset my car by disconnecting the battery and the u0073 came back after the emissions system self checked. I haven't been able to get back and check that out more.
2014 Scion tC. I have this DTC and c1241. If I turn on the A/C or use high beams, the 'BRAKE', ABS and traction light go on. Really sucks with the heat lol.
Did u fix it
@@zart3374 nope still driving without a/c in 100 F weather until I finally decide to just have the shop fix it.
@@zart3374 I fixed it. With all the complexity that could've been the cause it turned out to be a bad alternator. The NAPA alternator had perfectly OK running voltage and only was only a year old, so I didn't give it much thought. But I guess further testing was needed to recognize that it was putting out too much alternate current. Anyway the alternator was under warranty, so I got a replacement for free.
There was a problem with the device ABS I changed the device to a new one, and then a problem arose during the scan u0073
did you ever figure out the issue?
Battery
My shit only happen when it rain in my Mazdaspeed 3 idk what it mean.
It will need to be troubleshooted, but wiring connections may not be sealed and may be getting wet. Sometimes, the computer (ECM/PCM) located in the engine bay loses the seal that keeps moisture out, which can also cause issues.
My key fob dont work and i have this code 🤦🏽♂️
same here
did you find something ?