Engine-Codes.com
Engine-Codes – GMC – U007F 2018 GMC Sierra

U007F 2018 GMC Sierra Code - Control Module Communication FlexRay 1B Bus Off

Quick Answer

The U007F diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates an issue with the Control Module Communication FlexRay 1B Bus being off. Common causes include Wiring harness issues such as shorts or open circuits, Faulty control modules within the FlexRay network, Software glitches or programming errors. 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 2018 GMC Sierra indicates Control Module Communication FlexRay 1B Bus Off.
Common causes
Common causes include Wiring harness issues such as shorts or open circuits, Faulty control modules within the FlexRay network, Software glitches or programming errors.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code U007F 2018 GMC Sierra Description

The U007F diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates an issue with the Control Module Communication FlexRay 1B Bus being off. In modern vehicles, various control modules communicate with each other over a network known as the FlexRay bus. This network allows different systems within the vehicle to share information and work together seamlessly. When the Control Module Communication FlexRay 1B Bus is off, it means that there is a disruption in the communication between certain control modules, potentially leading to malfunctions in various vehicle systems.

OBDII Code U007F 2018 GMC Sierra - Control Module Communication FlexRay 1B Bus Off
U007F 2018 GMC Sierra Code - Control Module Communication FlexRay 1B Bus Off

Common Causes of U007F 2018 GMC Sierra

  1. Wiring harness issues such as shorts or open circuits.
  2. Faulty control modules within the FlexRay network.
  3. Software glitches or programming errors.
  4. Water intrusion or corrosion in the wiring connections.
  5. Physical damage to the FlexRay bus components.

Symptoms of U007F 2018 GMC Sierra

  1. Rough shifting or hesitation during acceleration.
  2. Warning lights illuminated on the dashboard.
  3. Loss of power or engine performance.
  4. Unresponsive electronic systems such as climate control or infotainment.
  5. Inability to communicate with certain control modules using diagnostic tools.

How to Fix U007F 2018 GMC Sierra

  1. Begin by conducting a thorough inspection of the wiring harness and connectors related to the FlexRay network.
  2. Use a diagnostic scan tool to identify the specific control module or modules that are not communicating properly.
  3. Check for any software updates or reprogramming that may be available from the manufacturer.
  4. Replace any faulty control modules or repair damaged wiring as needed.
  5. Perform a complete system check and test drive to ensure that the issue has been resolved.

Cost to Fix U007F 2018 GMC Sierra

The cost of repairing a U007F code on a 2018 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. In general, you can expect to pay anywhere from $200 to $500 for parts and labor. Keep in mind that diagnostic time and labor rates at auto repair shops can fluctuate, so it's advisable to obtain quotes from multiple sources before proceeding with the repair. Additionally, rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more competitive pricing.

Need more information about the U007F 2018 GMC Sierra code?

Need more information on how to fix the U007F 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U007F 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U007F 2018 GMC Sierra Code

1. What does the OBDII code U007F mean on a 2018 GMC Sierra?

The code U007F indicates a communication issue with the FlexRay 1B Bus, which is part of the vehicle's high-speed communication system used by control modules.

2. What are common symptoms of the U007F code in a 2018 GMC Sierra?

Symptoms may include warning lights on the dashboard, such as the check engine light or stability control light, loss of communication with certain modules, or erratic vehicle behavior.

3. What causes the U007F code in a 2018 GMC Sierra?

Common causes include damaged wiring, a faulty control module, a short or open circuit in the FlexRay bus, or power supply issues to the affected module.

4. Can I drive my 2018 GMC Sierra with the U007F code?

Driving with this code is not recommended, as it may lead to unpredictable behavior or safety system malfunctions due to impaired communication between control modules.

5. How do I diagnose the U007F code on a 2018 GMC Sierra?

Diagnosis involves using an advanced scan tool to check for related codes, inspecting the FlexRay wiring and connectors, and testing the affected modules for proper operation.

6. What repairs are commonly needed for the U007F code in a 2018 GMC Sierra?

Repairs could include fixing or replacing damaged wiring, reconnecting loose connectors, replacing a faulty control module, or updating the module’s software.

7. How much does it cost to fix the U007F code on a 2018 GMC Sierra?

The cost depends on the specific issue but can range from $100 for minor wiring repairs to over $1,000 if a control module needs replacement.

8. Can a faulty battery cause the U007F code on a 2018 GMC Sierra?

Yes, a weak or failing battery can lead to communication errors, including the U007F code, due to insufficient power supply to the control modules.

9. Does the U007F code require reprogramming of control modules?

In some cases, reprogramming or updating the software of control modules may be needed to resolve the issue after repairs are made.

10. Can I fix the U007F code on my 2018 GMC Sierra myself?

If you have experience with automotive diagnostics and access to the necessary tools, you can attempt basic inspections and repairs. However, complex issues may require professional assistance.

Discuss the causes and fixes for U007F 2018 GMC Sierra OBDII Code

Submit a New Comment

Code U007F 2018 GMC Sierra comments

No comments found for this page.