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U128F Acura Code - Gauge Control Module Lost Communication With BSI Radar Unit

Quick Answer

The U128F diagnostic trouble code for Acura vehicles indicates that there is a communication error between the Gauge Control Module (GCM) and the Blind Spot Information (BSI) radar unit. Common causes include Wiring harness or connector issues causing a poor connection between the GCM and BSI radar unit, Corrosion or damage to the wiring leading to signal interference, Faulty GCM or BSI radar unit components. 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
U128F Acura indicates Gauge Control Module Lost Communication With BSI Radar Unit.
Common causes
Common causes include Wiring harness or connector issues causing a poor connection between the GCM and BSI radar unit, Corrosion or damage to the wiring leading to signal interference, Faulty GCM or BSI radar unit components.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code U128F Acura Description

The U128F diagnostic trouble code for Acura vehicles indicates that there is a communication error between the Gauge Control Module (GCM) and the Blind Spot Information (BSI) radar unit. The GCM is responsible for controlling and displaying various gauges and warning lights on the instrument cluster, while the BSI radar unit is part of the vehicle's safety system that monitors the blind spots for potential hazards.

OBDII Code U128F Acura - Gauge Control Module Lost Communication With BSI Radar Unit
U128F Acura Code - Gauge Control Module Lost Communication With BSI Radar Unit

Common Causes of U128F Acura

  1. Wiring harness or connector issues causing a poor connection between the GCM and BSI radar unit.
  2. Corrosion or damage to the wiring leading to signal interference.
  3. Faulty GCM or BSI radar unit components.
  4. Software glitches or communication protocol errors between the modules.

Symptoms of U128F Acura

  1. Inaccurate or missing gauge readings on the instrument cluster.
  2. Warning lights related to the safety systems (such as blind spot monitoring) may illuminate.
  3. Loss of functionality in safety features like adaptive cruise control or lane-keeping assist.
  4. Erratic behavior of the instrument cluster, such as flickering lights or displays.

How to Fix U128F Acura

  1. Begin by conducting a thorough inspection of the wiring harness and connectors between the GCM and BSI radar unit. Repair or replace any damaged wiring or connectors.
  2. Check for any corrosion on the connectors and clean them as needed.
  3. Perform a diagnostic scan to determine if there are any software-related issues causing the communication error. Update or reprogram the modules as necessary.
  4. If the problem persists, consider replacing the GCM or BSI radar unit with new or refurbished components.
  5. After completing the repairs, clear the diagnostic trouble codes and test the vehicle to ensure that the communication between the modules has been restored.

Cost to Fix U128F Acura

The cost of repairing the U128F code can vary depending on the extent of the issue and the specific components that need to be replaced. In general, the cost of parts for a GCM or BSI radar unit can range from $200 to $500 each, while labor costs can add another $100 to $300 to the total repair bill. Overall, the total repair cost for addressing the communication error between the GCM and BSI radar unit may amount to $400 to $1000, including parts and labor.

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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 U128F Acura Code

1. What are the common symptoms of OBDII code U128F in an Acura related to the Gauge Control Module losing communication with the BSI Radar Unit?

- Common symptoms include malfunctioning gauges, warning lights on the dashboard, and issues with the radar system such as adaptive cruise control or collision warning not functioning properly.

2. What are the possible causes of the Gauge Control Module losing communication with the BSI Radar Unit in an Acura?

- Potential causes include wiring issues, faulty connections, a defective BSI Radar Unit, a malfunctioning Gauge Control Module, or software communication errors.

3. How can I diagnose the problem related to OBDII code U128F in my Acura?

- Proper diagnosis requires using an OBDII scanner to retrieve the specific code, checking the wiring and connections between the Gauge Control Module and BSI Radar Unit, and potentially testing the individual components for faults.

4. Can I still drive my Acura if I encounter the U128F code related to the Gauge Control Module and BSI Radar Unit communication issue?

- It is not recommended to drive the vehicle with this issue as it may affect critical safety systems like adaptive cruise control and collision warning, compromising your safety on the road.

5. How can I repair the communication problem between the Gauge Control Module and BSI Radar Unit in my Acura?

- To repair this issue, you may need to inspect and repair any damaged wiring, ensure proper connections between the components, or replace the faulty Gauge Control Module or BSI Radar Unit if necessary.

6. Is it possible to reset or clear the U128F code in an Acura without fixing the communication problem?

- While clearing the code may temporarily turn off the warning light, it is crucial to address the root cause of the communication issue to prevent it from recurring and potentially affecting safety systems.

7. Are there any DIY tips for troubleshooting the U128F code related to the Gauge Control Module and BSI Radar Unit in my Acura?

- DIY tips may include checking for loose connections, inspecting visible wiring for damage, and ensuring all related fuses are intact before seeking professional help for a more in-depth diagnosis and repair.

8. How much does it typically cost to repair the communication issue between the Gauge Control Module and BSI Radar Unit in an Acura?

- Repair costs can vary significantly depending on the exact cause of the problem, but it is advisable to budget for potential wiring repairs, component replacement, or labor costs associated with diagnosing and fixing the issue.

9. Can extreme weather conditions impact the communication between the Gauge Control Module and BSI Radar Unit in an Acura, triggering the U128F code?

- Yes, extreme weather conditions such as extreme heat or moisture can potentially affect the electrical connections and components involved, leading to communication issues and triggering the U128F code.

10. Is it necessary to visit a dealership or can an independent mechanic handle the repair for the U128F code in an Acura?

- While a dealership may have specialized knowledge and tools for Acura vehicles, an experienced independent mechanic familiar with automotive diagnostics and electrical systems can often diagnose and repair the communication issue effectively.

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