AutoCodes – Honda – B1005 Honda

B1005 Honda Code - MICU Lost Communication With Relay Control Module

Quick Answer

The Multiplex Control Unit Module (MICU) monitors the Relay Control Module. Common causes include Faulty Relay Control Module, Relay Control Module harness is open or shorted, Relay Control Module circuit poor electrical connection. 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: B1005 Honda indicates MICU Lost Communication With Relay Control Module.
Common causes: Common causes include Faulty Relay Control Module, Relay Control Module harness is open or shorted, Relay Control Module circuit poor electrical connection.
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 12,485

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 11, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1005 Honda Description

The Multiplex Control Unit Module (MICU) monitors the Relay Control Module. The MICU sets the OBDII code when the Relay Control Module is not to factory specifications.

OBDII Code B1005 Honda - MICU Lost Communication With Relay Control Module - AutoCodes.com — B1005 Honda Code - MICU Lost Communication With Relay Control Module

What does this mean?

What are the Possible Causes of the DTC B1005 Honda?

Faulty Relay Control Module
Relay Control Module harness is open or shorted
Relay Control Module circuit poor electrical connection
Faulty Multiplex Control Unit Module (MICU)

How to Fix the DTC B1005 Honda?

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 B1005 Honda 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 B1005 Honda code?

Need more information on how to fix the B1005 Honda code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1005 Honda 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 B1005 Honda Code

1. What are the common symptoms of OBDII code B1005 in a Honda, indicating MICU lost communication with the Relay Control Module?

- Common symptoms include issues with power windows, door locks, or other electrical components not functioning properly.

2. What are some possible causes of OBDII code B1005 in a Honda?

- Possible causes include a faulty Relay Control Module, issues with the Multiplex Integrated Control Unit (MICU), wiring problems, or a communication breakdown between components.

3. How can I diagnose the OBDII code B1005 in my Honda?

- Diagnosing this code typically involves using a diagnostic scanner to retrieve the error code, checking the connections and wiring related to the Relay Control Module and MICU, and performing tests to identify the root cause of the communication loss.

4. What are some repair tips for addressing OBDII code B1005 in a Honda?

- Repair tips may include checking and repairing any damaged wiring, replacing the faulty Relay Control Module or MICU, ensuring proper connections are secure, and clearing the error code with a diagnostic scanner after the repair.

5. Can I continue to drive my Honda with OBDII code B1005 present?

- It is not recommended to continue driving the vehicle with this error code present, as it may indicate underlying electrical issues that could potentially affect the safety and performance of the vehicle.

6. Is it possible to reset the OBDII code B1005 in a Honda without repairing the issue?

- While you can clear the error code temporarily with a diagnostic scanner, it is important to address the root cause of the problem to prevent the code from reappearing.

7. How much does it typically cost to repair OBDII code B1005 in a Honda?

- The cost of repair can vary depending on the specific issue causing the code, but it may involve expenses related to parts replacement, labor costs, and diagnostic fees.

8. Are there any preventive measures to avoid OBDII code B1005 from occurring in a Honda?

- Regular maintenance, such as checking electrical components for signs of wear and tear, ensuring proper connections, and addressing any issues promptly, can help prevent the occurrence of this code.

9. Can a DIY enthusiast address OBDII code B1005 in a Honda, or is professional help recommended?

- While some basic diagnostics and repairs may be possible for DIY enthusiasts, addressing complex electrical issues like this code may require specialized knowledge and tools, making professional help advisable.

10. How long does it typically take to repair OBDII code B1005 in a Honda?

- The repair time can vary depending on the specific cause of the issue, the availability of parts, and the expertise of the technician, but it may take a few hours to a full day to complete the repair.