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

Quick Answer

The U128F Honda code indicates that there is a communication problem between the Gauge Control Module (GCM) and the Blind Spot Information (BSI) Radar Unit in the vehicle. Common causes include Faulty wiring or connectors between the GCM and BSI Radar Unit, Defective GCM or BSI Radar Unit, Corrosion or damage to the communication bus lines. 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 Honda indicates Gauge Control Module Lost Communication With BSI Radar Unit.
Common causes
Common causes include Faulty wiring or connectors between the GCM and BSI Radar Unit, Defective GCM or BSI Radar Unit, Corrosion or damage to the communication bus lines.
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 07, 2024
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Code U128F Honda Description

The U128F Honda code indicates that there is a communication problem between the Gauge Control Module (GCM) and the Blind Spot Information (BSI) Radar Unit in the vehicle. The GCM is responsible for controlling and displaying various gauges and information on the instrument cluster, while the BSI Radar Unit is a crucial component for the vehicle's safety systems, specifically for detecting vehicles in the blind spot and providing warnings to the driver.

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

Common Causes of U128F Honda

  1. Faulty wiring or connectors between the GCM and BSI Radar Unit
  2. Defective GCM or BSI Radar Unit
  3. Corrosion or damage to the communication bus lines
  4. Software issues or glitches in the modules
  5. Electrical interference from aftermarket accessories or modifications

Symptoms of U128F Honda

  1. Malfunctioning gauges on the instrument cluster
  2. Loss of blind spot detection warnings
  3. Illumination of the check engine light
  4. Unresponsive touch screen display
  5. Erratic behavior of safety systems such as lane departure warning

How to Fix U128F Honda

  1. Perform a thorough inspection of the wiring and connectors between the GCM and BSI Radar Unit.
  2. Check for any signs of damage, corrosion, or loose connections and repair as necessary.
  3. Test the GCM and BSI Radar Unit for functionality and replace any faulty components.
  4. Reset the communication system between the modules and ensure proper communication is established.
  5. Clear the diagnostic trouble codes and perform a test drive to verify that the issue has been resolved.

Cost to Fix U128F Honda

The typical repair costs for addressing the U128F Honda code can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of parts such as a new GCM or BSI Radar Unit can range from $200 to $600 each, excluding labor. The labor costs for diagnosing and repairing this issue can range from $200 to $500, depending on the shop's hourly rates and the complexity of the repair process. It's advisable to consult with a professional mechanic or dealership to get an accurate estimate for your specific vehicle.

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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 Honda Code

1. What are the common symptoms of OBDII code U128F in a Honda related to Gauge Control Module Lost Communication With BSI Radar Unit?

- Common symptoms include malfunctioning radar-based safety features, such as adaptive cruise control or collision mitigation braking system.

2. What are the possible causes of OBDII code U128F in a Honda indicating Gauge Control Module communication loss with the BSI Radar Unit?

- Possible causes may include wiring issues, faulty radar unit, a malfunctioning gauge control module, or a communication network problem.

3. How can I diagnose the U128F trouble code in my Honda to pinpoint the issue with the Gauge Control Module and BSI Radar Unit communication?

- Proper diagnosis involves checking the wiring connections, inspecting the radar unit for damage, testing the gauge control module, and using a scan tool to assess communication signals.

4. Are there any quick repair tips for fixing the U128F code related to Gauge Control Module communication loss with the BSI Radar Unit in a Honda?

- Quick repair tips may include checking and repairing any damaged wiring, ensuring proper connections, resetting the system, or updating software if available.

5. Is it safe to continue driving my Honda with the U128F code indicating communication loss between the Gauge Control Module and BSI Radar Unit?

- It is not recommended to drive the vehicle with safety features affected by this code, as it may compromise your driving experience and safety on the road.

6. Can resetting the OBDII code U128F in a Honda resolve the communication issue between the Gauge Control Module and BSI Radar Unit?

- Resetting the code may temporarily clear the warning light, but it will not fix the underlying problem causing the communication loss between the modules.

7. How much does it typically cost to repair the U128F code related to Gauge Control Module communication loss with the BSI Radar Unit in a Honda?

- Repair costs can vary depending on the specific issue, but it may involve labor charges for diagnosis and repair, along with potential parts replacement if needed.

8. Are there any recalls or service bulletins related to the U128F OBDII code in Honda vehicles with Gauge Control Module communication issues?

- It's advisable to check with a Honda dealership or visit the manufacturer's website to see if there are any recalls or service bulletins addressing this specific problem.

9. Can a DIY enthusiast with automotive knowledge fix the U128F code indicating communication loss between the Gauge Control Module and BSI Radar Unit in a Honda?

- While some basic troubleshooting steps can be attempted, diagnosing and repairing issues related to complex electronic modules like the Gauge Control Module and BSI Radar Unit may require professional expertise.

10. How long does it typically take to repair the U128F code related to communication loss between the Gauge Control Module and BSI Radar Unit in a Honda?

- The repair time can vary based on the complexity of the issue, availability of parts, and the technician's experience, but it may range from a few hours to a day or more.

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