AutoCodes – Honda – B2162 Honda

B2162 Honda Code - Driver Side MPCS Unit Lost Communication With Relay Control Module

Quick Answer

The Driver Side Multiplex Control System (MPCS) has encountered a communication error with the Relay Control Module and the set the Diagnostic Trouble Code (DTC). 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: B2162 Honda indicates Driver Side MPCS Unit 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 716

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Sep 25, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2162 Honda Description

The Driver Side Multiplex Control System (MPCS) has encountered a communication error with the Relay Control Module and the set the Diagnostic Trouble Code (DTC).

OBDII Code B2162 Honda - Driver Side MPCS Unit Lost Communication With Relay Control Module - AutoCodes.com — B2162 Honda Code - Driver Side MPCS Unit Lost Communication With Relay Control Module

What does this mean?

What are the Possible Causes of the DTC B2162 Honda?

Faulty Relay Control Module
Relay Control Module harness is open or shorted
Relay Control Module circuit poor electrical connection

How to Fix the DTC B2162 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 B2162 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.

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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 B2162 Honda Code

1. What are the common symptoms of OBDII code B2162 in a Honda related to the Driver Side MPCS Unit Lost Communication With Relay Control Module?

The common symptoms include malfunctioning power door locks, non-functional power windows on the driver side, and issues with the driver's side mirror control.

2. What are the possible causes of OBDII code B2162 in a Honda?

The code B2162 usually indicates a malfunction in the communication between the driver side Multiplex Control Unit (MPCS) and the Relay Control Module. This can be caused by wiring issues, a faulty MPCS unit, a faulty relay control module, or a communication error within the vehicle's network.

3. How can I diagnose the OBDII code B2162 in my Honda?

To diagnose the code B2162, it is recommended to perform a thorough inspection of the wiring harness connecting the MPCS unit and the relay control module. Additionally, using a diagnostic scan tool to check for specific communication errors and testing the components involved can help pinpoint the issue.

4. Is it safe to continue driving my Honda with the OBDII code B2162 present?

While the vehicle may still be operable with the code B2162, it is not advisable to ignore the issue. The malfunctioning communication between the MPCS unit and the relay control module can lead to further electrical problems or affect the functionality of essential components. It is recommended to address the issue promptly.

5. Can I repair OBDII code B2162 in my Honda on my own?

Repairing the OBDII code B2162 may require advanced knowledge of automotive electrical systems. If you are experienced in troubleshooting electrical issues and have access to the necessary tools and resources, you may attempt the repair. However, seeking assistance from a qualified mechanic or dealership is recommended for accurate diagnosis and repair.

6. How much does it typically cost to repair OBDII code B2162 in a Honda?

The cost of repairing the OBDII code B2162 can vary depending on the underlying cause of the issue. It may involve replacing wiring harnesses, the MPCS unit, or the relay control module. The total cost can range from a few hundred dollars to over a thousand dollars, including parts and labor.

7. Can a faulty battery or alternator cause OBDII code B2162 to appear in a Honda?

While a faulty battery or alternator can potentially cause electrical issues in a vehicle, they are not typically direct causes of the specific code B2162 related to the driver side MPCS unit communication. It is advisable to focus on diagnosing the communication problem between the MPCS unit and the relay control module.

8. Will resetting the OBDII code B2162 clear the issue permanently in my Honda?

Resetting the OBDII code B2162 may temporarily clear the error code, but if the underlying issue with the communication between the MPCS unit and the relay control module persists, the code is likely to reappear. It is crucial to diagnose and address the root cause of the problem to prevent the code from returning.

9. How long does it typically take to repair OBDII code B2162 in a Honda?

The repair time for OBDII code B2162 can vary depending on the complexity of the issue and the availability of parts. In general, diagnosing and fixing the communication problem between the MPCS unit and the relay control module can take a few hours to a full day, depending on the extent of the repair needed.

10. Can OBDII code B2162 in a Honda affect the vehicle's overall performance?

While OBDII code B2162 primarily relates to the communication issue between the MPCS unit and the relay control module on the driver side, it can indirectly impact the vehicle's overall performance. Electrical malfunctions can lead to operational issues with power locks, windows, and mirrors, affecting the convenience and functionality of the vehicle.