AutoCodes – Acura – B1057 Acura

B1057 Acura Code - Relay Control Module Lost Communication With MICU

Quick Answer

The Relay Control Module monitors the Multiplex Control Unit Module (MICU). Common causes include Faulty Multiplex Control Unit Module (MICU), Multiplex Control Unit Module (MICU) harness is open or shorted, Multiplex Control Unit Module (MICU) 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: B1057 Acura indicates Relay Control Module Lost Communication With MICU.
Common causes: Common causes include Faulty Multiplex Control Unit Module (MICU), Multiplex Control Unit Module (MICU) harness is open or shorted, Multiplex Control Unit Module (MICU) 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 2,875

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 Nov 18, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1057 Acura Description

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

OBDII Code B1057 Acura - Relay Control Module Lost Communication With MICU - AutoCodes.com — B1057 Acura Code - Relay Control Module Lost Communication With MICU

What does this mean?

What are the Possible Causes of the DTC B1057 Acura?

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

How to Fix the DTC B1057 Acura?

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 B1057 Acura 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 B1057 Acura code?

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Need Help with the Code?

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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 B1057 Acura Code

1. What are the common symptoms of OBDII code B1057 in an Acura related to Relay Control Module Lost Communication With MICU?

- Common symptoms include issues with power windows, door locks, interior lights, and possibly other electrical components not functioning properly.

2. What are the possible causes of OBDII code B1057 in an Acura?

- The code B1057 can be triggered by a faulty relay control module, a malfunctioning multiplex integrated control unit (MICU), wiring issues, or a communication error between these components.

3. How can I diagnose the Relay Control Module Lost Communication With MICU issue in my Acura?

- Diagnosing this issue typically involves using a professional OBDII scanner to read the trouble codes, checking the wiring connections, and inspecting the relay control module and MICU for any visible damage.

4. Can I still drive my Acura if the OBDII code B1057 related to Relay Control Module Lost Communication With MICU is present?

- It's not recommended to drive your vehicle with this issue as it may affect the proper functioning of crucial electrical components, potentially leading to safety hazards or further damage.

5. How can I repair OBDII code B1057 in my Acura?

- Repairing this issue often involves replacing the faulty relay control module or MICU, repairing any damaged wiring, and clearing the trouble codes with a professional scanner.

6. Are there any DIY tips for troubleshooting OBDII code B1057 in an Acura?

- While some basic inspections like checking for loose connections or damaged wiring can be done at home, diagnosing and repairing this specific issue may require professional expertise and tools.

7. Is it common for Acura vehicles to experience the Relay Control Module Lost Communication With MICU issue?

- While not extremely common, this issue can occur in Acura vehicles, especially in older models or those with high mileage due to wear and tear on electrical components.

8. Can resetting the battery or disconnecting it fix the OBDII code B1057 problem in my Acura?

- Resetting the battery may temporarily clear the trouble code, but if the underlying issue with the relay control module or MICU persists, the code is likely to reappear.

9. How much does it cost to repair OBDII code B1057 in an Acura at a dealership or repair shop?

- The cost of repairing this issue can vary depending on the exact cause, parts needed, labor costs, and location. It's best to consult with a professional technician for an accurate estimate.

10. Is it possible to prevent the OBDII code B1057 related to Relay Control Module Lost Communication With MICU in my Acura?

- While some cases may be unavoidable due to component failure, regular maintenance and timely addressing of electrical issues can help prevent such codes from occurring.