AutoCodes – Toyota – C1A11 2016 Toyota RAV4

C1A11 2016 Toyota RAV4 Code - Front Radar Sensor Incorrect Axial Gap

Quick Answer

For vehicles with Dynamic Radar Cruise Control System: The Driving Support ECU Assembly uses the Millimeter Wave Radar Sensor Assembly to detect objects in front of the vehicle. Common causes include Faulty Millimeter Wave Radar Sensor Assembly, Millimeter Wave Radar Sensor Assembly harness is open or shorted, Millimeter Wave Radar Sensor Assembly 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: C1A11 2016 Toyota RAV4 indicates Front Radar Sensor Incorrect Axial Gap.
Common causes: Common causes include Faulty Millimeter Wave Radar Sensor Assembly, Millimeter Wave Radar Sensor Assembly harness is open or shorted, Millimeter Wave Radar Sensor Assembly 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 233

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 Feb 28, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code C1A11 2016 Toyota RAV4 Description

For vehicles with Dynamic Radar Cruise Control System: The Driving Support ECU Assembly uses the Millimeter Wave Radar Sensor Assembly to detect objects in front of the vehicle. When it is determined that the vehicle is being driven in a straight line or on a gradual curve based on signals from the yaw rate and acceleration sensor, the Millimeter Wave Radar Sensor Assembly performs self-diagnosis to check if the sensor beam axis has deviated. When the Millimeter Wave Radar Sensor Assembly beam axis is misaligned, the Driving Support ECU Assembly stores Diagnostic Trouble Code (DTC) C1A11. After installing a new Millimeter Wave Radar Sensor Assembly, if sensor beam axis adjustment is not performed, DTC C1A14 is stored.

For vehicles with Forward Recognition Camera System: The Forward Recognition Camera uses the Millimeter Wave Radar Sensor Assembly to detect obstacles in front of the vehicle. When the vehicle is determined to be driving in a straight line or on a gradual curve based on signals from the yaw rate sensor etc., the Millimeter Wave Radar Sensor Assembly performs self-diagnosis to check if the sensor beam axis has deviated from the vehicle movement direction. When the Millimeter Wave Radar Sensor Assembly beam axis has deviated, the Forward Recognition Camera detects this, and stores DTC C1A11. After installing a new Millimeter Wave Radar Sensor Assembly, if sensor beam axis adjustment is not performed, DTC C1A14 is stored.

For vehicles with Lane Departure Alert System (W/ Steering Control): The Forward Recognition Camera uses the Millimeter Wave Radar Sensor Assembly to detect obstacles in front of the vehicle. When the vehicle is determined to be driving in a straight line or on a gradual curve based on signals from the yaw rate sensor etc., the Millimeter Wave Radar Sensor Assembly performs self-diagnosis to check if the sensor beam axis has deviated from the vehicle movement direction. When the Millimeter Wave Radar Sensor Assembly beam axis has deviated, the Forward Recognition Camera detects this, and stores DTC C1A11.
After installing a new Millimeter Wave Radar Sensor Assembly, if sensor beam axis adjustment is not performed, DTC C1A14 is stored.

For vehicles with Pre-collision System: The Driving Support ECU Assembly uses the Millimeter Wave Radar Sensor Assembly to detect obstacles in front of the vehicle. Based on this information, the Driving Support ECU Assembly sends pre-collision control operation signals. When the vehicle is determined to be driving in a straight line or on a gradual curve based on signals from the airbag sensor assembly etc., the Millimeter Wave Radar Sensor Assembly performs self-diagnosis to check if the sensor beam axis has deviated from the vehicle movement direction. When the Millimeter Wave Radar Sensor Assembly beam axis has deviated, the Driving Support ECU Assembly detects this, and stores DTC C1A11. After installing a new Millimeter Wave Radar Sensor Assembly, if sensor beam axis adjustment is not performed, DTC C1A14 is stored.

OBDII Code C1A11 2016 Toyota RAV4 - Front Radar Sensor Incorrect Axial Gap - AutoCodes.com — C1A11 2016 Toyota RAV4 Code - Front Radar Sensor Incorrect Axial Gap

What does this mean?

What are the Possible Causes of the DTC C1A11 2016 Toyota RAV4?

Faulty Millimeter Wave Radar Sensor Assembly
Millimeter Wave Radar Sensor Assembly harness is open or shorted
Millimeter Wave Radar Sensor Assembly circuit poor electrical connection
Faulty Forward Recognition Camera (If equipped)
Faulty Driving Support ECU Assembly

How to Fix the DTC C1A11 2016 Toyota RAV4?

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 does this mean?

Code Tech Notes

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1A11 2016 Toyota RAV4 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.

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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 C1A11 2016 Toyota RAV4 Code

1. What are the common symptoms of OBDII code C1A11 in a 2016 Toyota RAV4?

The common symptoms of OBDII code C1A11 in a 2016 Toyota RAV4 include the malfunction indicator light (MIL) illuminating on the dashboard, warning messages related to the front radar sensor, and potential issues with the vehicle's adaptive cruise control system.

2. What does the OBDII code C1A11 in a 2016 Toyota RAV4 indicating "Front Radar Sensor Incorrect Axial Gap" mean?

The OBDII code C1A11 specifically indicates that there is an issue with the front radar sensor's axial gap, suggesting a potential misalignment or malfunction in the sensor's positioning or components.

3. What are the possible causes of OBDII code C1A11 in a 2016 Toyota RAV4?

Possible causes of OBDII code C1A11 in a 2016 Toyota RAV4 include a misaligned front radar sensor, damaged sensor components, electrical wiring issues, or a faulty sensor itself.

4. How can I diagnose the OBDII code C1A11 in a 2016 Toyota RAV4?

Diagnosing OBDII code C1A11 involves visually inspecting the front radar sensor for misalignment or damage, checking the sensor's wiring for any issues, and using a diagnostic scan tool to retrieve specific fault codes related to the sensor.

5. Can I repair OBDII code C1A11 in a 2016 Toyota RAV4 on my own?

Repairing OBDII code C1A11 may require specialized tools and expertise due to the complexity of the front radar sensor system. It is recommended to consult a professional mechanic or dealership for proper diagnosis and repair.

6. Is it safe to drive my 2016 Toyota RAV4 with OBDII code C1A11 active?

It is generally not recommended to drive your 2016 Toyota RAV4 with an active OBDII code C1A11, as it may affect the functionality of safety systems like adaptive cruise control. It is advisable to have the issue diagnosed and repaired promptly.

7. How much does it typically cost to repair OBDII code C1A11 in a 2016 Toyota RAV4?

The cost of repairing OBDII code C1A11 in a 2016 Toyota RAV4 can vary depending on the specific underlying issue. Costs may include labor charges for diagnosis and repair, parts replacement, and potential recalibration of the front radar sensor system.

8. Can extreme weather conditions affect the front radar sensor and trigger OBDII code C1A11 in a 2016 Toyota RAV4?

Yes, extreme weather conditions such as heavy rain, snow, or extreme temperatures can potentially affect the performance of the front radar sensor, leading to misalignments or malfunctions that trigger OBDII code C1A11.

9. How often should the front radar sensor be inspected in a 2016 Toyota RAV4 to prevent OBDII code C1A11 issues?

It is recommended to have the front radar sensor inspected during routine maintenance checks or whenever you notice any unusual behavior related to the vehicle's adaptive cruise control system to prevent OBDII code C1A11 issues.

10. Can resetting the vehicle's ECU clear OBDII code C1A11 in a 2016 Toyota RAV4?

Resetting the vehicle's ECU may temporarily clear the OBDII code C1A11, but if the underlying issue with the front radar sensor is not addressed and repaired, the code is likely to reappear. It is essential to diagnose and fix the root cause of the problem.