AutoCodes – Mercury – U0007 Mercury

U0007 Mercury Code - High Speed CAN Communication Bus (-) Low

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: U0007 Mercury indicates High Speed CAN Communication Bus (-) Low.
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 760

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 U0007 Mercury 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) U0007 sets when a High Speed Controller Area Network (HS-CAN) fault is present but the network may still be functional at a degraded level. One or more modules may not communicate and may not be sending or receiving messages.

OBDII Code U0007 Mercury - High Speed CAN Communication Bus (-) Low - AutoCodes.com — U0007 Mercury Code - High Speed CAN Communication Bus (-) Low

What does this mean?

What are the Possible Causes of the DTC U0007 Mercury?

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 U0007 Mercury?

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 U0007 Mercury 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 U0007 Mercury code?

Need more information on how to fix the U0007 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0007 Mercury 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 U0007 Mercury Code

1. What are the common symptoms of OBDII code U0007 (Mercury) High Speed CAN Communication Bus (-) Low?

- Common symptoms include issues with communication between control modules, malfunction indicator light (MIL) illumination, and potential loss of certain vehicle functions.

2. What can cause the OBDII code U0007 (Mercury) to trigger?

- The code U0007 is typically triggered by a fault in the wiring or connections related to the High Speed CAN Communication Bus (-) Low circuit.

3. How can I diagnose the cause of OBDII code U0007 (Mercury) High Speed CAN Communication Bus (-) Low?

- Diagnosis involves inspecting the wiring, connectors, and modules related to the High Speed CAN network, as well as using a diagnostic scanner to retrieve specific fault codes.

4. What are some tips for repairing OBDII code U0007 (Mercury) High Speed CAN Communication Bus (-) Low?

- Repair tips include checking for damaged wiring, loose connections, and corroded pins in the CAN bus system, as well as resetting the fault codes after repairs are made.

5. Can OBDII code U0007 (Mercury) High Speed CAN Communication Bus (-) Low be a serious issue?

- While the code itself may not directly affect the drivability of the vehicle, it can lead to communication errors between modules and potentially impact the functionality of various vehicle systems.

6. Is it safe to continue driving with OBDII code U0007 (Mercury) present?

- It is generally not recommended to continue driving with unresolved OBDII codes, as they can indicate underlying issues that may worsen over time and potentially lead to more serious problems.

7. How can a professional mechanic help with diagnosing and repairing OBDII code U0007 (Mercury) High Speed CAN Communication Bus (-) Low?

- A professional mechanic can use specialized diagnostic tools to pinpoint the exact cause of the communication error, perform thorough inspections, and make the necessary repairs to resolve the issue.

8. Are there any common culprits for causing OBDII code U0007 (Mercury) High Speed CAN Communication Bus (-) Low?

- Common culprits can include damaged wiring harnesses, faulty connectors, water intrusion, or issues with specific control modules on the High Speed CAN network.

9. Can weather conditions or environmental factors contribute to triggering OBDII code U0007 (Mercury)?

- Yes, extreme weather conditions or environmental factors like moisture, heat, or corrosion can potentially affect the integrity of the wiring and connections in the CAN bus system, leading to the code U0007.

10. How long does it typically take to diagnose and repair OBDII code U0007 (Mercury) High Speed CAN Communication Bus (-) Low?

- The time needed for diagnosis and repair can vary depending on the complexity of the issue, the accessibility of components, and the expertise of the individual performing the work. It is advisable to consult a professional for an accurate estimate.