AutoCodes – Mercury – U0005 Mercury

U0005 Mercury Code - High Speed CAN Communication Bus (+) High

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: U0005 Mercury indicates High Speed CAN Communication Bus (+) High.
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 775

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 U0005 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) U0005 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 U0005 Mercury - High Speed CAN Communication Bus (+) High - AutoCodes.com — U0005 Mercury Code - High Speed CAN Communication Bus (+) High

What does this mean?

What are the Possible Causes of the DTC U0005 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 U0005 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 U0005 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 U0005 Mercury code?

Need more information on how to fix the U0005 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0005 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 U0005 Mercury Code

1. What are the common symptoms of OBDII code U0005 in a Mercury vehicle?

The common symptoms of OBDII code U0005 (High Speed CAN Communication Bus (+) High) in a Mercury vehicle may include issues with the vehicle's communication system, malfunctioning electronic control modules, and various warning lights on the dashboard.

2. What could cause the OBDII code U0005 to appear in a Mercury car?

The OBDII code U0005 in a Mercury car is typically triggered by problems with the high-speed Controller Area Network (CAN) communication bus. Potential causes include damaged wiring, faulty connectors, or issues with the CAN bus network modules.

3. How can I diagnose the OBDII code U0005 in my Mercury vehicle?

Diagnosing the OBDII code U0005 in your Mercury vehicle involves using a diagnostic scanner to read the code, checking the wiring and connectors in the CAN bus system, and testing the communication between different modules using a multimeter or oscilloscope.

4. Is it safe to drive my Mercury car with the U0005 trouble code?

It is not recommended to drive your Mercury car with the U0005 trouble code present, as it indicates a potential issue with the vehicle's communication system. Continuing to drive the vehicle may lead to further electrical problems or malfunctions.

5. Can I repair the OBDII code U0005 in my Mercury vehicle myself?

Repairing the OBDII code U0005 in your Mercury vehicle may require advanced diagnostic skills and knowledge of automotive electronics. It is recommended to seek assistance from a qualified mechanic or dealership to properly diagnose and repair the issue.

6. Are there any common fixes for the U0005 trouble code in Mercury cars?

Common fixes for the U0005 trouble code in Mercury cars may include repairing damaged wiring, replacing faulty connectors, updating software in the control modules, or resetting the CAN bus system using a diagnostic tool.

7. How much does it cost to repair the OBDII code U0005 in a Mercury vehicle?

The cost to repair the OBDII code U0005 in a Mercury vehicle can vary depending on the underlying cause of the issue, the extent of the repairs needed, and the labor rates of the repair shop. It is advisable to obtain quotes from different mechanics or dealerships.

8. Can a low battery voltage trigger the U0005 trouble code in a Mercury car?

Low battery voltage can potentially affect the communication system in a Mercury car and trigger the U0005 trouble code. It is recommended to ensure the battery is in good condition and properly charged before diagnosing the issue.

9. Will resetting the OBDII code U0005 make it go away permanently?

Resetting the OBDII code U0005 may temporarily clear the code from the vehicle's system, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is important to diagnose and repair the root cause of the problem for a permanent fix.

10. How long does it take to repair the U0005 trouble code in a Mercury vehicle?

The time it takes to repair the U0005 trouble code in a Mercury vehicle can vary depending on the complexity of the issue and the availability of parts. Some repairs may be completed within a few hours, while others may take longer if extensive diagnostics or component replacements are required.