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Engine-Codes – Scion – C1408 Scion

C1408 Scion Code - Open Or Short In Rear Speed Sensor Left Circuit

Quick Answer

The C1408 diagnostic trouble code (DTC) for Scion vehicles indicates an open or short in the rear speed sensor left circuit. Common causes include Damaged or corroded wiring in the rear speed sensor circuit, Faulty rear speed sensor, Loose or disconnected electrical connectors. 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
C1408 Scion indicates Open Or Short In Rear Speed Sensor Left Circuit.
Common causes
Common causes include Damaged or corroded wiring in the rear speed sensor circuit, Faulty rear speed sensor, Loose or disconnected electrical connectors.
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 08, 2024
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Code C1408 Scion Description

The C1408 diagnostic trouble code (DTC) for Scion vehicles indicates an open or short in the rear speed sensor left circuit. This means that there is an issue with the electrical circuit that connects the rear speed sensor on the left side of the vehicle. The speed sensor is a crucial component of the vehicle's anti-lock braking system (ABS) and traction control system. It helps monitor the speed of the wheels and sends this information to the vehicle's electronic control unit (ECU) to ensure proper braking and stability control.

OBDII Code C1408 Scion - Open Or Short In Rear Speed Sensor Left Circuit
C1408 Scion Code - Open Or Short In Rear Speed Sensor Left Circuit

Common Causes of C1408 Scion

  1. Damaged or corroded wiring in the rear speed sensor circuit
  2. Faulty rear speed sensor
  3. Loose or disconnected electrical connectors
  4. Issues with the ABS module or ECU
  5. Water or debris intrusion causing a short in the circuit

Symptoms of C1408 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 traction on slippery surfaces
  5. Increased stopping distance during braking

How to Fix C1408 Scion

  1. Begin by visually inspecting the wiring harness and connectors for any signs of damage or corrosion. Repair or replace any damaged components.
  2. Test the rear speed sensor using a multimeter to check for proper resistance and continuity. Replace the sensor if necessary.
  3. Check and secure all electrical connections related to the rear speed sensor circuit.
  4. Clear the DTC using a diagnostic scan tool and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostic testing may be required to pinpoint the exact cause of the issue.

Cost to Fix C1408 Scion

The cost of repairing the C1408 code for an open or short in the rear speed sensor left circuit can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. On average, the repair cost can range from $150 to $400, including parts and labor. However, prices may be higher at dealerships or in metropolitan areas, while independent shops may offer lower rates. It is recommended to obtain quotes from multiple repair shops to get a more accurate estimate for your specific vehicle.

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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 C1408 Scion Code

1. What are the common symptoms of OBDII code C1408 in a Scion related to an open or short in the rear speed sensor left circuit?

The common symptoms include ABS warning light illuminated on the dashboard, traction control system malfunctions, and erratic speedometer readings.

2. What are the possible causes of OBDII code C1408 in a Scion indicating an open or short in the rear speed sensor left circuit?

Possible causes include damaged wiring or connectors, a faulty rear speed sensor, corrosion in the sensor connection, or a problem with the ABS control module.

3. How can I diagnose the issue related to OBDII code C1408 in my Scion myself?

You can start by visually inspecting the wiring and connectors for any damage or corrosion. You can also use a multimeter to test the continuity of the rear speed sensor and its connections.

4. Is it safe to continue driving my Scion with OBDII code C1408 indicating a problem with the rear speed sensor left circuit?

It is not recommended to continue driving the vehicle as the ABS and traction control systems may not function properly, increasing the risk of accidents.

5. How can I repair OBDII code C1408 in my Scion caused by an open or short in the rear speed sensor left circuit?

Repairing the issue may involve repairing or replacing damaged wiring, cleaning corroded connections, replacing the rear speed sensor, or addressing any faults in the ABS control module.

6. Can I reset the OBDII code C1408 in my Scion by disconnecting the battery?

While disconnecting the battery may clear the code temporarily, it is important to address the underlying issue causing the fault code to prevent it from reoccurring.

7. Are there any specific tools or equipment required to diagnose and repair OBDII code C1408 in a Scion?

You may need a multimeter for electrical testing, a diagnostic scanner to read and clear fault codes, and basic hand tools for accessing components like the rear speed sensor.

8. How much does it typically cost to repair OBDII code C1408 related to the rear speed sensor left circuit in a Scion?

The cost of repair can vary depending on the specific cause of the issue, but it may range from $100 to $500 or more, including parts and labor.

9. Can a DIY enthusiast with basic mechanical skills fix OBDII code C1408 in a Scion at home?

Depending on the exact cause of the issue, a DIY enthusiast with some mechanical skills may be able to diagnose and repair the problem, especially if it involves simple tasks like checking and cleaning connectors.

10. Will OBDII code C1408 in a Scion reset itself after the issue is fixed?

Once the underlying issue causing the fault code is resolved, you may need to use a diagnostic scanner to clear the code from the vehicle's computer memory.

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