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C1404 2018 Toyota RAV4 Code - Rear Speed Sensor Left Malfunction

Quick Answer

The C1404 diagnostic trouble code (DTC) for a 2018 Toyota RAV4 indicates a malfunction in the rear speed sensor located on the left side of the vehicle. Common causes include Faulty rear speed sensor, Damaged or corroded wiring/connectors leading to the sensor, Sensor misalignment or improper installation. 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
C1404 2018 Toyota RAV4 indicates Rear Speed Sensor Left Malfunction.
Common causes
Common causes include Faulty rear speed sensor, Damaged or corroded wiring/connectors leading to the sensor, Sensor misalignment or improper installation.
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 17, 2024
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Code C1404 2018 Toyota RAV4 Description

The C1404 diagnostic trouble code (DTC) for a 2018 Toyota RAV4 indicates a malfunction in the rear speed sensor located on the left side of the vehicle. The speed sensor is a crucial component of the anti-lock braking system (ABS) and traction control system. It is responsible for monitoring the speed of the wheel and sending this information to the vehicle's electronic control unit (ECU). When the ECU detects an issue with the rear speed sensor on the left side, it triggers the C1404 code.

OBDII Code C1404 2018 Toyota RAV4 - Rear Speed Sensor Left Malfunction
C1404 2018 Toyota RAV4 Code - Rear Speed Sensor Left Malfunction

Common Causes of C1404 2018 Toyota RAV4

  1. Faulty rear speed sensor
  2. Damaged or corroded wiring/connectors leading to the sensor
  3. Sensor misalignment or improper installation
  4. Electronic control unit (ECU) malfunction
  5. Wheel bearing issues affecting sensor readings

Symptoms of C1404 2018 Toyota RAV4

  1. Illumination of the ABS warning light on the dashboard
  2. Traction control system malfunction indicator
  3. Erratic or pulsating brake pedal during ABS activation
  4. Increased stopping distance during braking
  5. Uneven braking performance between the left and right rear wheels

How to Fix C1404 2018 Toyota RAV4

  1. Begin by diagnosing the specific cause of the malfunction using a professional diagnostic scan tool.
  2. Inspect the rear speed sensor and its wiring for any visible damage, corrosion, or misalignment.
  3. Replace the faulty rear speed sensor if necessary, ensuring proper installation and alignment.
  4. Clear the DTC from the ECU memory using the diagnostic scan tool.
  5. Test drive the vehicle to verify that the issue has been resolved and that the ABS and traction control systems are functioning correctly.

Cost to Fix C1404 2018 Toyota RAV4

The typical repair costs for addressing a rear speed sensor left malfunction on a 2018 Toyota RAV4 can range from $150 to $400, including parts and labor. However, it's essential to note that actual costs may vary depending on the specific diagnosis time, labor rates, and the price of the replacement sensor. Rates at auto repair shops can vary based on location, vehicle make and model, and the type of engine. It's advisable to consult with local shops to obtain a more accurate estimate for this repair.

What does this mean?

Tech Notes for C1404 2018 Toyota RAV4

Because the Rear Axle Hub and Bearing Assembly cannot be disassembled, if the Rear Speed Sensor needs replacement, replace the Rear Axle Hub and Bearing Assembly.

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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 C1404 2018 Toyota RAV4 Code

1. What are the common symptoms of OBDII code C1404 in a 2018 Toyota RAV4?

- Common symptoms include the ABS warning light turning on, traction control system malfunctions, and possible issues with the vehicle's stability control.

2. What does the OBDII code C1404 indicate in a 2018 Toyota RAV4?

- The code specifically points to a malfunction in the rear speed sensor on the left side of the vehicle.

3. What are the possible causes of the Rear Speed Sensor Left Malfunction (C1404) in a 2018 Toyota RAV4?

- Potential causes include a faulty speed sensor, damaged wiring or connectors, sensor misalignment, or issues with the sensor's signal.

4. How can I diagnose the Rear Speed Sensor Left Malfunction (C1404) in my 2018 Toyota RAV4?

- Diagnosing the issue involves inspecting the speed sensor and its connections, checking for any visible damage, and using a diagnostic scanner to read the specific trouble code.

5. Can I continue driving my 2018 Toyota RAV4 with the C1404 code triggered?

- It is not recommended to drive the vehicle with the C1404 code active, as it can affect the proper functioning of the ABS, traction control, and stability control systems.

6. How can I repair the Rear Speed Sensor Left Malfunction (C1404) in my 2018 Toyota RAV4?

- Repair typically involves replacing the faulty speed sensor, repairing or replacing damaged wiring, ensuring proper sensor alignment, and clearing the trouble code with a diagnostic tool.

7. Can weather or road conditions trigger the C1404 code in a 2018 Toyota RAV4?

- Extreme weather conditions or driving on rough terrain can potentially impact the speed sensor, leading to the triggering of the C1404 trouble code.

8. Is it advisable to reset the OBDII code C1404 in a 2018 Toyota RAV4 without addressing the underlying issue?

- It is not recommended to simply reset the code without addressing the root cause, as the problem may persist and affect the vehicle's safety systems.

9. How much does it typically cost to repair the Rear Speed Sensor Left Malfunction (C1404) in a 2018 Toyota RAV4?

- The cost of repair can vary depending on the extent of the issue, but replacing a speed sensor and addressing related wiring problems may range from $200 to $500 at a repair shop.

10. Can a DIY enthusiast with basic automotive knowledge fix the C1404 code in a 2018 Toyota RAV4?

- While some DIYers may be able to replace a speed sensor or check wiring connections, it's recommended to consult a professional if unsure about diagnosing or repairing the issue to ensure proper function and safety.

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