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U12B7 Acura Code - Millimeter Wave Radar Local CAN Malfunction

Quick Answer

The U12B7 diagnostic trouble code for Acura vehicles indicates a Millimeter Wave Radar Local CAN Malfunction. Common causes include Faulty millimeter wave radar sensor, Damaged wiring or connectors in the radar system, Corrosion or moisture in the radar system 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
U12B7 Acura indicates Millimeter Wave Radar Local CAN Malfunction.
Common causes
Common causes include Faulty millimeter wave radar sensor, Damaged wiring or connectors in the radar system, Corrosion or moisture in the radar system 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 U12B7 Acura Description

The U12B7 diagnostic trouble code for Acura vehicles indicates a Millimeter Wave Radar Local CAN Malfunction. This code specifically relates to an issue with the millimeter wave radar system, which is a key component of the vehicle's advanced driver assistance systems (ADAS). The millimeter wave radar system is responsible for features such as adaptive cruise control, collision mitigation braking, and lane-keeping assist.

OBDII Code U12B7 Acura - Millimeter Wave Radar Local CAN Malfunction
U12B7 Acura Code - Millimeter Wave Radar Local CAN Malfunction

Common Causes of U12B7 Acura

  1. Faulty millimeter wave radar sensor.
  2. Damaged wiring or connectors in the radar system.
  3. Corrosion or moisture in the radar system components.
  4. Software glitches or communication errors within the CAN network.
  5. Electrical issues such as a blown fuse or relay related to the radar system.

Symptoms of U12B7 Acura

  1. Malfunction or complete failure of adaptive cruise control.
  2. Inoperable collision mitigation braking system.
  3. Loss of lane-keeping assist functionality.
  4. Warning lights related to the radar system on the dashboard.
  5. Unusual behavior or erratic movements from the radar sensors.

How to Fix U12B7 Acura

  1. Begin by diagnosing the specific cause of the U12B7 code using a diagnostic scanner to pinpoint the exact issue within the millimeter wave radar system.
  2. Inspect the radar sensor, wiring, and connectors for any signs of damage or corrosion.
  3. Test the radar system components for proper functionality and communication.
  4. Reset the radar system and clear the trouble code to see if the issue persists.
  5. Replace any faulty components, such as the radar sensor or wiring harness, and retest the system to ensure proper operation.

Cost to Fix U12B7 Acura

The typical repair costs for addressing a U12B7 code can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the replacement of a millimeter wave radar sensor can range from $500 to $1000, while addressing wiring or connector issues may cost between $200 and $500. Labor costs for diagnostics and repairs can add an additional $100 to $300 to the total cost. It's important to keep in mind that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the shop's labor rates. It's advisable to consult with a qualified mechanic or repair shop to get a more accurate estimate for addressing a U12B7 code on an Acura 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 U12B7 Acura Code

1. What are the common symptoms of the U12B7 Acura OBDII code indicating Millimeter Wave Radar Local CAN Malfunction?

- Common symptoms include issues with the adaptive cruise control system, malfunctioning blind spot information system, and sporadic radar sensor errors.

2. What are the potential causes of the U12B7 Acura code related to Millimeter Wave Radar Local CAN Malfunction?

- Possible causes include faulty millimeter wave radar sensor, damaged radar wiring harness, poor electrical connections, or a malfunctioning CAN bus communication system.

3. How can I diagnose the U12B7 Acura code for Millimeter Wave Radar Local CAN Malfunction?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific code, checking the radar sensor and wiring for physical damage, and testing the CAN bus communication for any faults.

4. Is it safe to continue driving with the U12B7 Acura code indicating Millimeter Wave Radar Local CAN Malfunction?

- It is not recommended to drive the vehicle with this code active, as it may lead to safety systems like adaptive cruise control and blind spot monitoring not functioning properly.

5. Can I reset the U12B7 Acura OBDII code for Millimeter Wave Radar Local CAN Malfunction on my own?

- While you can clear the code with an OBDII scanner, it is crucial to address the underlying issue causing the code to prevent it from reoccurring.

6. How can I repair the U12B7 Acura code related to Millimeter Wave Radar Local CAN Malfunction?

- Repair options may include replacing the faulty radar sensor, repairing or replacing damaged wiring, ensuring secure electrical connections, or diagnosing and fixing any CAN bus communication issues.

7. Are there any DIY tips for fixing the U12B7 Acura OBDII code indicating Millimeter Wave Radar Local CAN Malfunction?

- DIY tips may include visually inspecting the radar sensor and wiring for damage, checking and securing electrical connections, and ensuring the radar sensor is free from obstructions.

8. Can extreme weather conditions affect the U12B7 Acura code for Millimeter Wave Radar Local CAN Malfunction?

- Yes, extreme weather conditions like heavy rain, snow, or extreme temperatures can potentially impact the operation of the radar sensor and contribute to the code being triggered.

9. How long does it typically take to repair the U12B7 Acura code associated with Millimeter Wave Radar Local CAN Malfunction?

- The repair time can vary depending on the specific issue causing the code. Simple fixes like securing connections may take less time, while sensor or wiring replacements may require more time.

10. Is it necessary to visit a dealership for the U12B7 Acura OBDII code regarding Millimeter Wave Radar Local CAN Malfunction?

- While a dealership may have specialized knowledge and tools for diagnosing and repairing this code, independent auto repair shops with experience in Acura vehicles can also effectively address the issue.

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