AutoCodes – Acura – B1900 Acura

B1900 Acura Code - Communication Bus Line Error

Quick Answer

The Multiplex Integrated Control Unit (MICU) has encountered a Communication Bus Line Error with other control units. 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: B1900 Acura indicates Communication Bus Line Error.
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.

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Code Popularity 867

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
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Code B1900 Acura Description

The Multiplex Integrated Control Unit (MICU) has encountered a Communication Bus Line Error with other control units.

OBDII Code B1900 Acura - Communication Bus Line Error - AutoCodes.com — B1900 Acura Code - Communication Bus Line Error

What does this mean?

What are the Possible Causes of the DTC B1900 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 B1900 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 B1900 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.

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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 B1900 Acura Code

1. What are the common symptoms of OBDII code B1900 Acura (Communication Bus Line Error)?

The common symptoms include malfunctioning dashboard gauges, non-functional power windows, unresponsive audio system, and intermittent communication issues with the vehicle's modules.

2. What are the possible causes of OBDII code B1900 Acura?

The code B1900 in an Acura is typically triggered by a faulty communication bus line, damaged wiring harness, loose connections, or a malfunctioning control module.

3. How can I diagnose the Communication Bus Line Error in my Acura?

Diagnosing the B1900 code involves checking the wiring harness for any visible damage, inspecting the connections, testing the control modules, and using a scan tool to communicate with the vehicle's network.

4. Can a DIY enthusiast repair the Communication Bus Line Error in an Acura?

While some basic troubleshooting like checking connections and inspecting wiring can be done by DIY enthusiasts, advanced diagnostics and repairs for the B1900 code may require professional help due to the complexity of the vehicle's electrical system.

5. Are there any specific repair tips for fixing the B1900 code in an Acura?

Repair tips for resolving the Communication Bus Line Error include ensuring all connections are secure, repairing any damaged wiring, resetting the control modules, and reprogramming the vehicle's network if necessary.

6. Is it safe to drive my Acura with the B1900 code present?

It is not recommended to drive your Acura with the B1900 code active, as it can lead to further communication issues within the vehicle's systems, potentially affecting safety features and overall functionality.

7. How much does it typically cost to repair the Communication Bus Line Error in an Acura?

The cost of repairing the B1900 code in an Acura can vary depending on the extent of the issue, parts needed for replacement, and labor costs. It is advisable to obtain estimates from qualified technicians or repair shops.

8. Can the B1900 code be triggered by a dead battery in an Acura?

Yes, a dead or low battery in an Acura can sometimes trigger the B1900 code due to disruptions in the electrical system. It is recommended to ensure the battery is in good condition before diagnosing the code further.

9. Will the B1900 code clear on its own after repairs are made?

After repairing the Communication Bus Line Error in an Acura, the B1900 code may not clear on its own. A scan tool may be required to reset the code and ensure that the issue has been successfully resolved.

10. How can I prevent the B1900 code from reoccurring in my Acura?

To prevent the B1900 code from reoccurring, perform regular maintenance checks on the vehicle's electrical system, ensure all connections are secure, and address any issues promptly to avoid further communication errors.