AutoCodes – Acura – B2156 Acura

B2156 Acura Code - Driver Side MPCS Unit Lost Communication With MICU

Quick Answer

The Driver side Multiplex Control System (MPCS) has encountered a communication error with the Multiplex Integrated Control Unit (MICU) and the set the Diagnostic Trouble Code (DTC). Common causes include Faulty Multiplex Integrated Control Unit (MICU), Multiplex Integrated Control Unit (MICU) harness is open or shorted, Multiplex Integrated Control Unit (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: B2156 Acura indicates Driver Side MPCS Unit Lost Communication With MICU.
Common causes: Common causes include Faulty Multiplex Integrated Control Unit (MICU), Multiplex Integrated Control Unit (MICU) harness is open or shorted, Multiplex Integrated Control Unit (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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,142

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 Sep 24, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B2156 Acura Description

The Driver side Multiplex Control System (MPCS) has encountered a communication error with the Multiplex Integrated Control Unit (MICU) and the set the Diagnostic Trouble Code (DTC).

OBDII Code B2156 Acura - Driver Side MPCS Unit Lost Communication With MICU - AutoCodes.com — B2156 Acura Code - Driver Side MPCS Unit Lost Communication With MICU

What does this mean?

What are the Possible Causes of the DTC B2156 Acura?

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

How to Fix the DTC B2156 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 B2156 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 B2156 Acura code?

Need more information on how to fix the B2156 Acura code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2156 Acura 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 B2156 Acura Code

1. What are the common symptoms of OBDII code B2156 in an Acura related to the Driver Side MPCS Unit Lost Communication With MICU?

- Common symptoms include malfunctioning power windows, door locks, or mirrors on the driver side.

2. What can cause the OBDII code B2156 in an Acura?

- This code is typically caused by a communication error between the driver side Multiplex Control Unit (MPCS) and the Multiplex Integrated Control Unit (MICU).

3. How can I diagnose the issue related to code B2156 in my Acura?

- You can diagnose the issue by checking the wiring connections between the MPCS and MICU, ensuring they are secure and free from damage.

4. Can a blown fuse be a possible cause of code B2156 in an Acura?

- Yes, a blown fuse in the system that controls the MPCS and MICU communication can trigger the B2156 code.

5. What are some repair tips for resolving OBDII code B2156 in an Acura?

- Start by checking and replacing any blown fuses, then inspect the wiring harness for any damage or corrosion. Resetting the system after repairs may clear the code.

6. Is it possible to clear the B2156 code in an Acura without fixing the underlying issue?

- While clearing the code may temporarily turn off the check engine light, it's crucial to address the communication problem between the MPCS and MICU to prevent further issues.

7. Can the B2156 code affect other electrical components in the Acura?

- Yes, since the MPCS and MICU control various electrical functions in the vehicle, a communication error between them can impact other related systems.

8. Are there any safety concerns associated with the B2156 code in an Acura?

- The malfunctioning power windows, door locks, or mirrors resulting from this code can affect the driver's ability to operate these essential vehicle functions safely.

9. How long does it typically take to repair the B2156 code issue in an Acura?

- The repair time can vary based on the exact cause of the communication error, but it may take anywhere from 30 minutes to a few hours to diagnose and fix the problem.

10. Should I seek professional help to address the B2156 code in my Acura?

- If you are not experienced in diagnosing or repairing electrical issues in vehicles, it's recommended to consult a professional mechanic or dealership to properly address the B2156 code and ensure the problem is resolved correctly.