AutoCodes – Toyota – C1406 2018 Toyota RAV4

C1406 2018 Toyota RAV4 Code - Open or Short in Front Speed Sensor Left Circuit

Quick Answer

The speed sensor detects the wheel speed and sends the appropriate signals to the Skid Control ECU (Brake Actuator Assembly). Common causes include Faulty Front Speed Sensor Left, Front Speed Sensor Left harness is open or shorted, Front Speed Sensor Left 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: C1406 2018 Toyota RAV4 indicates Open or Short in Front Speed Sensor Left Circuit.
Common causes: Common causes include Faulty Front Speed Sensor Left, Front Speed Sensor Left harness is open or shorted, Front Speed Sensor Left 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 880

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 Jan 23, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code C1406 2018 Toyota RAV4 Description

The speed sensor detects the wheel speed and sends the appropriate signals to the Skid Control ECU (Brake Actuator Assembly). These signals are used for Anti-Lock Brake System (ABS) control. Speed sensor rotors have rows of alternating N and S magnetic poles, and their magnetic fields change when the rotors turn. Each speed sensor detects that magnetic change and sends a pulse signal to the Skid Control ECU (Brake Actuator Assembly).

OBDII Code C1406 2018 Toyota RAV4 - Open or Short in Front Speed Sensor Left Circuit - AutoCodes.com — C1406 2018 Toyota RAV4 Code - Open or Short in Front Speed Sensor Left Circuit

What does this mean?

What are the Possible Causes of the DTC C1406 2018 Toyota RAV4?

Faulty Front Speed Sensor Left
Front Speed Sensor Left harness is open or shorted
Front Speed Sensor Left circuit poor electrical connection
Faulty Skid Control ECU (Brake Actuator Assembly)

How to Fix the DTC C1406 2018 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

Start by checking the passenger side wheel speed sensor for physical damage.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1406 2018 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.

Need more information about the C1406 2018 Toyota RAV4 code?

Need more information on how to fix the C1406 2018 Toyota RAV4 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1406 2018 Toyota RAV4 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 C1406 2018 Toyota RAV4 Code

1. What are the common symptoms of OBDII code C1406 in a 2018 Toyota RAV4?

- Common symptoms include the ABS warning light being illuminated on the dashboard and possible issues with the vehicle's traction control system.

2. What does the OBDII code C1406 "Open or Short in Front Speed Sensor Left Circuit" indicate?

- This code indicates a problem with the front left speed sensor circuit, suggesting either an open circuit or a short circuit.

3. What are possible causes of OBDII code C1406 in a 2018 Toyota RAV4?

- Possible causes include damaged wiring or connectors associated with the front left speed sensor, a faulty speed sensor itself, or issues with the ABS module.

4. How can I diagnose the issue related to OBDII code C1406 in my Toyota RAV4?

- Diagnosing the issue involves inspecting the wiring and connectors for damage, testing the front left speed sensor for proper functionality, and checking the ABS module for any faults.

5. Can I drive my Toyota RAV4 with OBDII code C1406?

- It is not recommended to drive the vehicle with this code present, as it may affect the operation of the ABS system and compromise overall safety.

6. How can I repair OBDII code C1406 in my 2018 Toyota RAV4?

- Repair typically involves fixing any damaged wiring or connectors, replacing the front left speed sensor if necessary, and clearing the code with a diagnostic tool.

7. Is it possible to reset the OBDII code C1406 without fixing the underlying issue?

- While you can clear the code temporarily, it is crucial to address the root cause to prevent the problem from recurring and ensure the proper functioning of the ABS system.

8. Can extreme weather conditions cause OBDII code C1406 to trigger in a Toyota RAV4?

- Yes, extreme weather conditions such as excessive heat or moisture can sometimes lead to issues with the speed sensor circuit, triggering the C1406 code.

9. How long does it typically take to repair OBDII code C1406 in a 2018 Toyota RAV4?

- The repair time can vary depending on the exact cause of the issue, but it may take anywhere from 1 to 3 hours to diagnose and fix the problem.

10. Will OBDII code C1406 cause my Toyota RAV4 to fail a vehicle inspection?

- Yes, if the ABS warning light is illuminated due to this code, it may lead to a failed vehicle inspection as the ABS system is considered a crucial safety component.