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Engine-Codes – Generic – C1A11

C1A11 Code - Front Radar Sensor Incorrect Axial Gap

Quick Answer

The C1A11 code indicates that there is an issue with the front radar sensor's incorrect axial gap. Common causes include Misalignment of the front radar sensor, Physical damage to the sensor due to a minor collision or debris impact, Electrical issues affecting the sensor's functionality. 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
C1A11 indicates Front Radar Sensor Incorrect Axial Gap.
Common causes
Common causes include Misalignment of the front radar sensor, Physical damage to the sensor due to a minor collision or debris impact, Electrical issues affecting the sensor's functionality.
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 C1A11 Description

The C1A11 code indicates that there is an issue with the front radar sensor's incorrect axial gap. The front radar sensor is a crucial component of the vehicle's advanced driver assistance system (ADAS), responsible for detecting objects in front of the vehicle and providing input for features such as adaptive cruise control, collision avoidance, and automatic emergency braking.

OBDII Code C1A11 - Front Radar Sensor Incorrect Axial Gap
C1A11 Code - Front Radar Sensor Incorrect Axial Gap

Common Causes of C1A11

  1. Misalignment of the front radar sensor
  2. Physical damage to the sensor due to a minor collision or debris impact
  3. Electrical issues affecting the sensor's functionality
  4. Corrosion or water damage to the sensor components
  5. Faulty calibration of the sensor

Symptoms of C1A11

  1. Malfunctioning adaptive cruise control
  2. Inaccurate collision warning alerts
  3. Automatic emergency braking not functioning correctly
  4. Warning light on the dashboard related to the ADAS system
  5. Erratic behavior of the vehicle's safety features

How to Fix C1A11

  1. Inspect the front radar sensor for any physical damage or misalignment.
  2. Check the sensor's wiring and connections for any signs of corrosion or damage.
  3. Calibrate the front radar sensor according to the manufacturer's specifications.
  4. Test the sensor's functionality by conducting a test drive and checking the ADAS features.
  5. Clear the diagnostic trouble codes and reset the system to ensure the issue has been resolved.

Cost to Fix C1A11

The typical repair costs for addressing a front radar sensor incorrect axial gap issue can vary depending on the extent of the problem and the specific vehicle make and model. In general, the cost of replacing or repairing a front radar sensor can range from $200 to $1000, including parts and labor. Additional costs may be incurred if other components of the ADAS system require attention. It is important to consult with a professional mechanic or dealership to get an accurate estimate based on your specific vehicle and location.

What does this mean?

Tech Notes for C1A11

When replacing the Driving Support ECU Assembly, make sure to replace it with a new one. If a device that was installed on another vehicle is used, the information stored in the Driving Support ECU Assembly will not match the information from the vehicle, and as a result, a DTC may be stored.
When the Millimeter Wave Radar Sensor Assembly is replaced with a new one, adjustment of the radar sensor beam axis must be performed.
If the Forward Recognition Camera has been replaced with a new one, be sure to perform Recognition Camera/Target Position Memory and Recognition Camera Axis Adjust.

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Code C1A11 Information for Specific Makes

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 C1A11 Code

1. What are the common symptoms of OBDII code C1A11 (Front Radar Sensor Incorrect Axial Gap)?

- Common symptoms include the malfunction indicator light (MIL) turning on, issues with adaptive cruise control, and potential loss of collision warning functionality.

2. What can cause the OBDII code C1A11 to trigger?

- The code C1A11 is typically triggered when the front radar sensor detects an incorrect axial gap, which may be caused by sensor misalignment, physical damage, or calibration issues.

3. How can I diagnose the Front Radar Sensor Incorrect Axial Gap issue?

- Diagnosis involves visually inspecting the front radar sensor for any physical damage, ensuring proper alignment, and performing calibration using specialized equipment.

4. Is it safe to continue driving with OBDII code C1A11 present?

- While the vehicle may still be operable, it is recommended to address the issue promptly to maintain the proper functioning of safety systems like adaptive cruise control and collision warning.

5. Can I repair the Front Radar Sensor Incorrect Axial Gap issue myself?

- Repairing the issue may require specialized tools and expertise, so it is advisable to consult with a professional technician or dealership for proper diagnosis and repair.

6. How much does it typically cost to fix OBDII code C1A11?

- The cost of repair can vary depending on the underlying cause of the issue, but it may involve sensor realignment, calibration, or even sensor replacement, which can range from a few hundred to over a thousand dollars.

7. Will resetting the OBDII code C1A11 make it go away permanently?

- Resetting the code may temporarily clear the MIL, but if the root cause of the issue is not addressed, the code is likely to reappear once the system detects the fault again.

8. Can environmental factors affect the Front Radar Sensor Incorrect Axial Gap?

- Yes, factors such as extreme weather conditions, road debris, or improper sensor cleaning can impact the performance of the front radar sensor and potentially trigger the C1A11 code.

9. How long does it take to fix the Front Radar Sensor Incorrect Axial Gap issue?

- The repair time can vary based on the specific cause of the problem, but it may take a few hours to a day for diagnosis, calibration, and potential sensor replacement, if needed.

10. Are there any preventive measures to avoid OBDII code C1A11 in the future?

- Regular maintenance, keeping the front radar sensor clean, and avoiding impacts to the sensor area can help prevent issues leading to the Front Radar Sensor Incorrect Axial Gap fault code.

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