AutoCodes – Honda – U12B7 Honda

U12B7 Honda Code - Millimeter Wave Radar Local CAN Malfunction

Quick Answer

The Diagnostic Trouble Code (DTC) sets when a Controller Area Network (CAN) communication malfunction was detected between the Multipurpose Camera Unit Local and the Millimeter Wave Radar. Common causes include Faulty Millimeter Wave Radar, Millimeter Wave Radar harness is open or shorted, Millimeter Wave Radar 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: U12B7 Honda indicates Millimeter Wave Radar Local CAN Malfunction.
Common causes: Common causes include Faulty Millimeter Wave Radar, Millimeter Wave Radar harness is open or shorted, Millimeter Wave Radar 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 8,255

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 May 16, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U12B7 Honda Description

The Diagnostic Trouble Code (DTC) sets when a Controller Area Network (CAN) communication malfunction was detected between the Multipurpose Camera Unit Local and the Millimeter Wave Radar.

OBDII Code U12B7 Honda - Millimeter Wave Radar Local CAN Malfunction - AutoCodes.com — U12B7 Honda Code - Millimeter Wave Radar Local CAN Malfunction

What does this mean?

What are the Possible Causes of the DTC U12B7 Honda?

Faulty Millimeter Wave Radar
Millimeter Wave Radar harness is open or shorted
Millimeter Wave Radar circuit poor electrical connection
Faulty Multipurpose Camera Unit

How to Fix the DTC U12B7 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 U12B7 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.

Need more information about the U12B7 Honda code?

Need more information on how to fix the U12B7 Honda code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U12B7 Honda 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 U12B7 Honda Code

1. What are the common symptoms of OBDII code U12B7 Honda (Millimeter Wave Radar Local CAN Malfunction)?

The common symptoms of this code may include issues with the adaptive cruise control system, malfunctioning radar sensors, and warning lights on the dashboard.

2. What can cause the U12B7 Honda code to appear?

The U12B7 code typically appears due to a malfunction in the millimeter wave radar system, faulty radar sensors, damaged wiring, or issues with the local Controller Area Network (CAN) communication network.

3. How can I diagnose the Millimeter Wave Radar Local CAN Malfunction in a Honda vehicle?

Diagnosing this issue usually involves using a diagnostic scanner to read the specific U12B7 trouble code, inspecting the radar sensors and wiring for any visible damage, and performing a CAN bus communication test.

4. Is it safe to drive with the U12B7 error code present?

It is not recommended to drive the vehicle with the U12B7 code active, as it can affect the proper functioning of the radar-based safety systems like adaptive cruise control, collision mitigation braking, and lane keep assist.

5. Can I repair the U12B7 Honda code on my own?

Repairing the U12B7 code may require advanced diagnostic tools and expertise due to the complexity of the radar system. It is often best to consult a professional mechanic or dealership for proper diagnosis and repair.

6. How much does it typically cost to fix the Millimeter Wave Radar Local CAN Malfunction in a Honda?

The cost of fixing the U12B7 error code can vary depending on the root cause of the issue, parts needed for replacement, and labor charges. It is advisable to get a few quotes from different repair shops.

7. Will resetting the trouble codes make the U12B7 code disappear permanently?

Resetting the trouble codes may temporarily clear the U12B7 code, but if the underlying issue is not fixed, the code is likely to reappear once the system detects the problem again.

8. Can extreme weather conditions trigger the U12B7 Honda fault code?

Extreme weather conditions such as heavy rain, snow, or extreme temperatures can potentially impact the radar sensors and contribute to the U12B7 error code appearing in Honda vehicles.

9. Are there any recalls related to the U12B7 Honda code?

It is advisable to check with Honda or the National Highway Traffic Safety Administration (NHTSA) for any recalls or technical service bulletins related to the U12B7 code affecting specific Honda models.

10. How long does it usually take to repair the Millimeter Wave Radar Local CAN Malfunction issue?

The repair time for the U12B7 code can vary depending on the exact cause of the problem and the availability of parts. It is recommended to consult with a professional technician for an accurate estimate.