AutoCodes – Cadillac – U007F Cadillac

U007F Cadillac Code - Control Module Communication FlexRay 1B Bus Off

Quick Answer

The devices connected to the object high-speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Check for more codes, Faulty Control Module, Control Module harness is open or shorted. 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 Cadillac indicates Control Module Communication FlexRay 1B Bus Off.
Common causes: Common causes include Check for more codes, Faulty Control Module, Control Module harness is open or shorted.
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 Popularity 305

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jul 20, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U007F Cadillac Description

The devices connected to the object high-speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices when the ignition switch is in any position other than OFF. The object high-speed GMLAN serial data bus uses terminating resistors that are in parallel with the object high-speed GMLAN (+) and (-) circuits. The Diagnostic Trouble Code (DTC) sets when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U007F Cadillac - Control Module Communication FlexRay 1B Bus Off - AutoCodes.com — U007F Cadillac Code - Control Module Communication FlexRay 1B Bus Off

What does this mean?

What are the Possible Causes of the DTC U007F Cadillac?

Check for more codes
Faulty Control Module
Control Module harness is open or shorted
Control Module circuit poor electrical connection

How to Fix the DTC U007F Cadillac?

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 U007F Cadillac 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.

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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 Cadillac Code

1. What does the OBDII code U007F mean on a Cadillac?

U007F indicates a communication issue on the FlexRay 1B bus, which is used by control modules to exchange data.

2. What are the common symptoms of a U007F code in a Cadillac?

Symptoms may include warning lights on the dashboard, loss of communication with certain modules, or malfunctioning vehicle systems such as stability control or adaptive suspension.

3. What causes the U007F code on a Cadillac?

Common causes include damaged wiring or connectors in the FlexRay bus, a malfunctioning control module, or electrical interference affecting communication.

4. How can I repair the U007F code on my Cadillac?

Inspect the FlexRay bus wiring and connectors for damage, ensure proper grounding, and test the affected control modules to identify faults.

5. Can driving with a U007F code cause further damage?

Yes, continued driving with this communication fault may lead to additional failures in systems relying on data from affected modules.

6. Does the U007F code require module replacement?

Not always; sometimes the issue can be fixed by repairing wiring or connectors, but in some cases, a faulty control module may need to be replaced.

7. How do I diagnose the U007F code on a Cadillac?

Use a professional diagnostic scanner to check for related codes, inspect the FlexRay bus for continuity, and verify module functionality.

8. What systems can be affected by the U007F code?

Systems such as traction control, braking, or adaptive suspension may be impacted due to loss of communication between modules.

9. Is the U007F code specific to Cadillacs?

No, U007F is a generic code found in various vehicles, but the specific implementation and affected systems may vary by manufacturer, including Cadillac.

10. Can a weak battery cause the U007F code in a Cadillac?

Yes, low voltage or electrical issues can disrupt communication on the FlexRay bus, potentially triggering the U007F code.