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Engine-Codes – Scion – C1404 Scion

C1404 Scion Code - Rear Speed Sensor Left Malfunction

Quick Answer

The C1404 Scion code indicates a malfunction in the rear speed sensor located on the left side of the vehicle. Common causes include Faulty rear speed sensor, Damaged wiring or connectors, Corrosion or debris affecting sensor operation. 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 Scion indicates Rear Speed Sensor Left Malfunction.
Common causes
Common causes include Faulty rear speed sensor, Damaged wiring or connectors, Corrosion or debris affecting sensor operation.
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 15, 2024
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Code C1404 Scion Description

The C1404 Scion code 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 computer system. When the sensor detects any inconsistencies or malfunctions, it triggers the C1404 code.

OBDII Code C1404 Scion - Rear Speed Sensor Left Malfunction
C1404 Scion Code - Rear Speed Sensor Left Malfunction

Common Causes of C1404 Scion

  1. Faulty rear speed sensor
  2. Damaged wiring or connectors
  3. Corrosion or debris affecting sensor operation
  4. Issues with the ABS control module
  5. Electrical problems in the ABS system

Symptoms of C1404 Scion

  1. ABS warning light illuminated on the dashboard
  2. Traction control system malfunction
  3. Erratic braking behavior, such as pulsating brakes
  4. Loss of stability control during cornering
  5. Increased stopping distance

How to Fix C1404 Scion

  1. Begin by diagnosing the specific cause of the malfunction using a diagnostic scanner to read the ABS system codes.
  2. Inspect the rear speed sensor on the left side for any visible damage or signs of wear. Replace the sensor if necessary.
  3. Check the wiring and connectors connected to the speed sensor for any damage or corrosion. Repair or replace as needed.
  4. Clear the ABS system codes and perform a test drive to ensure the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying issues with the ABS control module or other components.

Cost to Fix C1404 Scion

The typical repair costs for addressing a rear speed sensor left malfunction (C1404 Scion) can range from $150 to $300, including parts and labor. However, it's important to note that the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour for labor. Rates may be higher at dealerships or in metropolitan areas, while independent shops often offer lower rates. It's advisable to obtain local quotes for a more accurate estimate.

What does this mean?

Tech Notes for C1404 Scion

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 Scion Code

1. What are the common symptoms of OBDII code C1404 (Scion) Rear Speed Sensor Left Malfunction?

The common symptoms include ABS warning light illuminated on the dashboard, traction control system malfunctions, and potential loss of stability control.

2. What causes the OBDII code C1404 (Scion) Rear Speed Sensor Left Malfunction?

The code is typically triggered by a faulty rear speed sensor on the left side of the vehicle. This sensor is responsible for monitoring the speed of the wheel and providing data to the ABS system.

3. How can I diagnose the OBDII code C1404 (Scion) Rear Speed Sensor Left Malfunction?

Diagnosing this code involves using an OBDII scanner to retrieve the specific code, inspecting the rear speed sensor and its wiring for any damage, and testing the sensor's functionality.

4. Can I continue driving with the OBDII code C1404 (Scion) Rear Speed Sensor Left Malfunction?

It is not recommended to drive with this code active, as it can affect the proper functioning of the ABS and traction control systems, potentially compromising vehicle safety.

5. How do I repair the OBDII code C1404 (Scion) Rear Speed Sensor Left Malfunction?

The typical repair involves replacing the faulty rear speed sensor on the left side of the vehicle with a new, OEM-quality part. Ensure proper installation and calibration for optimal performance.

6. Are there any DIY tips for fixing the OBDII code C1404 (Scion) Rear Speed Sensor Left Malfunction?

While replacing the rear speed sensor may require some technical knowledge, DIY enthusiasts can follow detailed online guides and tutorials to perform the repair at home. However, professional help is recommended for accurate diagnosis and repair.

7. Will resetting the OBDII code C1404 (Scion) Rear Speed Sensor Left Malfunction make it go away permanently?

Simply resetting the code may temporarily clear the warning light, but if the underlying issue with the rear speed sensor is not fixed, the code is likely to return. Proper diagnosis and repair are essential for a permanent solution.

8. How much does it cost to repair the OBDII code C1404 (Scion) Rear Speed Sensor Left Malfunction?

The cost of repairing this code can vary depending on the vehicle model, labor rates, and whether you choose to replace the sensor yourself or have a professional mechanic do the job. It's advisable to obtain quotes from different sources for an accurate estimate.

9. Can extreme weather conditions cause the OBDII code C1404 (Scion) Rear Speed Sensor Left Malfunction?

While extreme weather conditions may not directly cause this code, they can exacerbate existing issues with the rear speed sensor or its wiring. It's important to keep the sensor and its connections well-protected to prevent malfunctions.

10. How often should I inspect the rear speed sensor to prevent the OBDII code C1404 (Scion) Rear Speed Sensor Left Malfunction?

Regular inspections during routine maintenance checks or whenever you experience symptoms like ABS warning lights can help detect potential issues with the rear speed sensor early on, reducing the risk of triggering the code.

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