U0073 2014 GMC Sierra Code - Control Module Communication Bus OFF
Quick Answer
The U0073 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates that the control module communication bus has been turned off. Common causes include Faulty control module, Wiring or connection issues in the communication network, Corrosion or damage to the CAN bus wiring. 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 2014 GMC Sierra indicates Control Module Communication Bus OFF.
- Common causes
- Common causes include Faulty control module, Wiring or connection issues in the communication network, Corrosion or damage to the CAN bus wiring.
- 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.
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Code U0073 2014 GMC Sierra Description
The U0073 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates that the control module communication bus has been turned off. In modern vehicles, various control modules communicate with each other over a network known as the Controller Area Network (CAN). This network allows different modules, such as the engine control module, transmission control module, anti-lock brake system module, and others, to share information and work together to ensure the vehicle operates smoothly.
Common Causes of U0073 2014 GMC Sierra
- Faulty control module
- Wiring or connection issues in the communication network
- Corrosion or damage to the CAN bus wiring
- Software glitches in the control modules
- Electrical issues such as a blown fuse
Symptoms of U0073 2014 GMC Sierra
- Check engine light illuminated on the dashboard
- Loss of communication with various control modules
- Erratic behavior of vehicle systems (e.g., transmission shifting irregularly)
- Inability to start the vehicle
- Reduced fuel efficiency
How to Fix U0073 2014 GMC Sierra
- Perform a thorough inspection of the wiring and connections in the communication network.
- Check for any corrosion or damage to the CAN bus wiring and repair or replace as necessary.
- Scan the vehicle's control modules for any fault codes and address any issues found.
- Reset the control module communication bus and re-establish communication between modules.
- Test drive the vehicle to ensure that the issue has been resolved and that all systems are functioning properly.
Cost to Fix U0073 2014 GMC Sierra
The cost of repairing the U0073 code on a 2014 GMC Sierra can vary depending on the specific cause of the issue. In general, the repair costs for this type of problem can range from $100 to $500, including parts and labor. However, it is important to note that the actual cost may be higher or lower based on factors such as the location of the repair shop, the make and model of the vehicle, and the extent of the repairs needed. Additionally, diagnostic time and labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. It is recommended to obtain quotes from local repair shops to get a more accurate estimate for this repair.
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Frequently Asked Questions about U0073 2014 GMC Sierra Code
What does the OBDII code U0073 mean in a 2014 GMC Sierra?
U0073 indicates a communication issue on the control module communication bus, meaning that one or more control modules in the vehicle are not communicating properly.
What are the common symptoms of the U0073 code?
Common symptoms include warning lights on the dashboard, such as the check engine light, erratic instrument panel behavior, loss of power to various systems, or failure of certain functions like cruise control or stability control.
What could cause the U0073 code to trigger in my GMC Sierra?
Possible causes include faulty wiring or connectors in the communication bus, a malfunctioning control module, a dead battery or poor battery connections, and software issues in the vehicle's modules.
How can I diagnose the U0073 code?
Start by checking for any other stored codes, inspecting the wiring and connectors related to the communication bus, and testing the affected control modules for proper function. A professional scan tool may be needed for deeper diagnostics.
What should I do if my Sierra shows the U0073 code?
If you see the U0073 code, it's advisable to take the vehicle to a qualified mechanic or dealership for a thorough inspection and proper diagnosis, as it may require specialized tools and knowledge.
Can I drive my GMC Sierra with the U0073 code?
While it may be possible to drive the vehicle, it is not recommended, as the communication issues can lead to loss of critical functions and may pose safety risks.
What repairs are commonly needed to fix the U0073 code?
Repairs may involve fixing or replacing damaged wiring or connectors, reprogramming or replacing the affected control module, or addressing any underlying electrical issues.
How much could it cost to repair the U0073 code?
Repair costs can vary widely depending on the specific issue, but you may expect to pay anywhere from $100 to $1,000 or more, depending on whether it involves simple repairs or module replacement.
Is the U0073 code specific to GMC vehicles?
No, the U0073 code is a generic OBDII trouble code that can occur in various makes and models of vehicles, not just GMC. It relates to general communication issues among control modules.
Can I reset the U0073 code myself?
You can attempt to reset the code using an OBDII scanner, but if the underlying issue is not resolved, the code is likely to reappear. It’s best to diagnose and fix the root cause before resetting.
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