U0073 2018 GMC Sierra Code - Control Module Communication Bus OFF
Quick Answer
Modules connected to the high-speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Module/Device that is not communicating, Module/Device harness is open or shorted, Module/Device circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- U0073 2018 GMC Sierra indicates Control Module Communication Bus OFF.
- Common causes
- Common causes include Faulty Module/Device that is not communicating, Module/Device harness is open or shorted, Module/Device circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code U0073 2018 GMC Sierra Description
What are the Possible Causes of the DTC U0073 2018 GMC Sierra?
- Faulty Module/Device that is not communicating
- Module/Device harness is open or shorted
- Module/Device circuit poor electrical connection
How to Fix the DTC U0073 2018 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the U0073 2018 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the U0073 2018 GMC Sierra code?
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Frequently Asked Questions about U0073 2018 GMC Sierra Code
1. What does the OBDII code U0073 for a 2018 GMC Sierra mean?
The code U0073 indicates a communication bus off error related to the control module communication system in the vehicle.
2. What are the common symptoms of the U0073 code in a 2018 GMC Sierra?
Common symptoms include issues with the vehicle's electrical systems, such as warning lights on the dashboard, loss of communication with various control modules, and sporadic or complete loss of certain functions.
3. What are the possible causes of the U0073 code in a 2018 GMC Sierra?
Potential causes include damaged wiring or connectors, faulty control modules, software issues, a weak or dead battery, or a problem with the communication network itself.
4. How can I diagnose the U0073 code in my 2018 GMC Sierra?
Diagnosis typically involves checking the wiring and connectors for damage, testing the control modules for proper function, and using a scan tool to analyze the communication network for faults.
5. How can I repair the U0073 code in my 2018 GMC Sierra?
Repairing the U0073 code may involve repairing or replacing damaged wiring, connectors, or control modules, updating software if necessary, and ensuring the battery is in good condition.
6. Can I continue driving my 2018 GMC Sierra with the U0073 code present?
It is not recommended to drive the vehicle with the U0073 code active, as it may lead to further electrical issues or loss of critical functions while driving.
7. Will resetting the U0073 code make it go away permanently?
Resetting the code may temporarily clear the warning light, but if the underlying issue causing the U0073 code is not fixed, it is likely to return.
8. How much does it typically cost to repair the U0073 code in a 2018 GMC Sierra?
The cost of repair can vary depending on the specific cause of the U0073 code, but it may range from a simple fix like repairing wiring to more complex issues involving control module replacement.
9. Can a DIY enthusiast fix the U0073 code in a 2018 GMC Sierra?
DIY enthusiasts with the necessary tools and knowledge of automotive electrical systems may be able to diagnose and repair simple causes of the U0073 code, such as checking for loose connections or damaged wiring.
10. Is the U0073 code specific to the 2018 GMC Sierra, or can it occur in other vehicles?
The U0073 code is not specific to the 2018 GMC Sierra and can occur in other vehicles with similar control module communication systems.
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