U007F GMC Code - Control Module Communication FlexRay 1B Bus Off
Quick Answer
The U007F GMC code indicates a problem with the Control Module Communication FlexRay 1B Bus, specifically that the bus is off. Common causes include Faulty control module, Damaged wiring or connectors in the FlexRay network, Corrosion or poor connections in the communication bus. 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
- U007F GMC indicates Control Module Communication FlexRay 1B Bus Off.
- Common causes
- Common causes include Faulty control module, Damaged wiring or connectors in the FlexRay network, Corrosion or poor connections in the communication bus.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code U007F GMC Description
The U007F GMC code indicates a problem with the Control Module Communication FlexRay 1B Bus, specifically that the bus is off. The FlexRay bus is a high-speed communication network used in modern vehicles to transmit data between various control modules. When this bus is not functioning properly, it can lead to communication issues between different modules, affecting the vehicle's performance and functionality.
Common Causes of U007F GMC
- Faulty control module
- Damaged wiring or connectors in the FlexRay network
- Corrosion or poor connections in the communication bus
- Electrical interference from aftermarket devices
- Software issues in the control modules
Symptoms of U007F GMC
- Check engine light illuminated
- Loss of communication with various control modules
- Erratic behavior of electronic systems (e.g., radio, HVAC)
- Inability to start the vehicle
- Reduced fuel efficiency
How to Fix U007F GMC
- Perform a thorough inspection of the FlexRay communication network to identify any damaged wiring or connectors.
- Test the control modules for proper functionality and communication.
- Repair or replace any faulty wiring, connectors, or control modules.
- Clear the diagnostic trouble codes and reset the system to re-establish communication on the FlexRay bus.
- Conduct a road test to ensure that the communication bus is functioning correctly and that all systems are operating as intended.
Cost to Fix U007F GMC
The cost of repairing a U007F GMC code related to the Control Module Communication FlexRay 1B Bus Off can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the repair costs for this type of problem can range from $200 to $800, including parts and labor. However, it's important to note that diagnostic time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. It's recommended to obtain quotes from local auto repair shops to get a more accurate estimate for this repair.
Need more information about the U007F GMC code?
Need more information on how to fix the U007F GMC code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the U007F GMC code diagnosed by a professional: Find a repair shop in your area
Information for Specific GMC Models
- U007F 2014 GMC Sierra — Control Module Communication FlexRay 1B Bus Off
- U007F 2015 GMC Sierra — Control Module Communication FlexRay 1B Bus Off
- U007F 2016 GMC Sierra — Control Module Communication FlexRay 1B Bus Off
- U007F 2017 GMC Sierra — Control Module Communication FlexRay 1B Bus Off
- U007F 2018 GMC Sierra — Control Module Communication FlexRay 1B Bus Off
Frequently Asked Questions about U007F GMC Code
What does the OBDII code U007F mean for GMC vehicles?
The U007F code indicates a communication failure on the FlexRay 1B bus, which is a high-speed communication network used between control modules in the vehicle.
What are the common symptoms of the U007F code in GMC vehicles?
Symptoms may include warning lights on the dashboard, such as the check engine or service light, loss of communication with certain modules, or intermittent electrical issues.
What causes the U007F code to appear in GMC vehicles?
Common causes include faulty wiring or connectors in the FlexRay 1B bus, a malfunctioning control module, or a software glitch in one of the networked modules.
Can I drive my GMC with the U007F code active?
While the vehicle may still be drivable, communication issues between modules could compromise performance or safety features, making it important to address the problem promptly.
How is the U007F code diagnosed?
A technician will use a scan tool to check for related codes, inspect the FlexRay wiring and connectors, and test the affected control modules for proper communication.
What repairs are typically needed to fix the U007F code?
Repairs may include fixing or replacing damaged wiring, cleaning or reconnecting loose connectors, updating module software, or replacing a faulty control module.
Can a dead battery cause the U007F code in GMC vehicles?
Yes, a dead or weak battery can disrupt communication on the FlexRay network, potentially triggering the U007F code.
Is the U007F code specific to GMC vehicles?
No, the U007F code can appear on other vehicles that use the FlexRay communication network, but its specific implications may vary by make and model.
How much does it cost to repair a U007F code on a GMC vehicle?
Repair costs vary depending on the root cause but can range from $100 for simple wiring repairs to over $1,000 if a control module replacement is necessary.
Can I fix the U007F code myself?
If you have experience with automotive electronics, you can inspect wiring and connectors for damage or loose connections. However, more complex issues like module reprogramming or replacement typically require professional tools and expertise.
Discuss the causes and fixes for U007F GMC OBDII Code
Code U007F GMC comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.