AutoCodes – Ford – U0009 Ford

U0009 Ford Code - High Speed CAN Communication Bus (-) Shorted To Bus (+)

Quick Answer

Multiplexing is a method of sending 2 or more signals simultaneously over a single circuit. Common causes include Diagnosis of this Diagnostic Trouble Code (DTC) is accomplished via the vehicle symptom(s), Check for more codes, Faulty Control Module. 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: U0009 Ford indicates High Speed CAN Communication Bus (-) Shorted To Bus (+).
Common causes: Common causes include Diagnosis of this Diagnostic Trouble Code (DTC) is accomplished via the vehicle symptom(s), Check for more codes, Faulty Control Module.
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 2,051

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 29, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0009 Ford Description

Multiplexing is a method of sending 2 or more signals simultaneously over a single circuit. Multiplexing allows 2 or more electronic modules (nodes) to communicate over a twisted wire pair [data (+) and data (-)] network. The information or messages that can be communicated on these wires consists of commands, status or data. Multiplexing reduces the weight of the vehicle by reducing the number of redundant components and electrical wiring. The vehicle has 4 module communication networks connected to the DLC, located under the instrument panel. The communication networks are: HEV High Speed Controller Area Network (HS-CAN), High Speed Controller Area Network (HS-CAN), Medium Speed Controller Area Network (MS-CAN) and Infotainment Controller Area Network (I-CAN). The Diagnostic Trouble Code (DTC) U0009 sets when a High Speed Controller Area Network (HS-CAN) fault was present at a point in time. The fault is not currently present since the module is communicating with the scan tool.

OBDII Code U0009 Ford - High Speed CAN Communication Bus (-) Shorted To Bus (+) - AutoCodes.com — U0009 Ford Code - High Speed CAN Communication Bus (-) Shorted To Bus (+)

What does this mean?

What are the Possible Causes of the DTC U0009 Ford?

Diagnosis of this Diagnostic Trouble Code (DTC) is accomplished via the vehicle symptom(s)
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 U0009 Ford?

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 U0009 Ford 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 U0009 Ford code?

Need more information on how to fix the U0009 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0009 Ford 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 U0009 Ford Code

1. What are the common symptoms of OBDII code U0009 in a Ford vehicle?

- Common symptoms include issues with the vehicle's communication network, such as difficulty starting the vehicle, erratic behavior of electronic components, and warning lights on the dashboard.

2. What does the OBDII code U0009 Ford indicate?

- The code U0009 indicates a High Speed CAN Communication Bus (-) Shorted To Bus (+) fault in the vehicle's communication network.

3. What are the possible causes of the U0009 code in a Ford vehicle?

- Possible causes include damaged wiring in the high-speed CAN network, a short circuit between the high-speed CAN bus negative and positive wires, or a faulty control module.

4. How can I diagnose the U0009 code in my Ford vehicle?

- Diagnosis typically involves using a scan tool to access the vehicle's network and checking for trouble codes, inspecting the wiring for damage, and testing the control modules for proper functioning.

5. Can I drive my Ford vehicle with the U0009 code present?

- It is not recommended to drive the vehicle with the U0009 code present, as it can lead to further electrical issues and potential safety hazards.

6. How can I repair the High Speed CAN Communication Bus (-) Shorted To Bus (+) issue in my Ford vehicle?

- Repairing the issue may involve locating and repairing the damaged wiring, replacing any faulty control modules, and clearing the trouble codes with a scan tool.

7. Is the U0009 code easy to fix, or should I seek professional help?

- The complexity of fixing the U0009 code can vary depending on the extent of the issue. If you are not experienced in diagnosing and repairing electrical problems, it is recommended to seek professional help.

8. Can a DIY enthusiast fix the U0009 code at home?

- A DIY enthusiast with experience in automotive electrical systems may be able to diagnose and repair the U0009 code at home, but it is essential to have the necessary tools and knowledge to do so safely and effectively.

9. How much does it typically cost to repair the U0009 code in a Ford vehicle?

- The cost of repairing the U0009 code can vary depending on the extent of the damage and the specific repairs needed, but it may range from a few hundred to a few thousand dollars.

10. How can I prevent the U0009 code from reoccurring in my Ford vehicle?

- To prevent the U0009 code from reoccurring, it is essential to properly maintain the vehicle's electrical system, avoid electrical overloads, and address any warning signs promptly to prevent further damage.