AutoCodes – Generic – C1403

C1403 Code - Rear Speed Sensor Right Malfunction

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 Rear Speed Sensor Right (Rear Axle Hub and Bearing Assembly Right), Rear Speed Sensor Right Rotor (Rear Axle Hub and Bearing Assembly Right), Rear Speed Sensor Right harness is open or shorted. 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: C1403 indicates Rear Speed Sensor Right Malfunction.
Common causes: Common causes include Faulty Rear Speed Sensor Right (Rear Axle Hub and Bearing Assembly Right), Rear Speed Sensor Right Rotor (Rear Axle Hub and Bearing Assembly Right), Rear Speed Sensor Right harness is open or shorted.
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 18,323

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 19, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code C1403 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 C1403 - Rear Speed Sensor Right Malfunction - AutoCodes.com — C1403 Code - Rear Speed Sensor Right Malfunction

What does this mean?

What are the Possible Causes of the DTC C1403?

Faulty Rear Speed Sensor Right (Rear Axle Hub and Bearing Assembly Right)
Rear Speed Sensor Right Rotor (Rear Axle Hub and Bearing Assembly Right)
Rear Speed Sensor Right harness is open or shorted
Rear Speed Sensor Right circuit poor electrical connection

How to Fix the DTC C1403?

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

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1403 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 C1403 code?

Need more information on how to fix the C1403 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1403 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1403 Lexus — Rear Speed Sensor Right Malfunction
C1403 Scion — Rear Speed Sensor Right Malfunction
C1403 Toyota — Rear Speed Sensor Right Malfunction

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 C1403 Code

1. What does the OBDII code C1403 mean?

C1403 indicates a malfunction in the rear speed sensor on the right side, which is responsible for monitoring wheel speed and providing data to the ABS and traction control systems.

2. What are the common symptoms of the C1403 code?

Symptoms may include an illuminated ABS or traction control warning light, poor braking performance, loss of traction control functionality, or erratic speedometer readings.

3. What causes the C1403 code to appear?

Common causes include a faulty rear right wheel speed sensor, damaged sensor wiring or connectors, a dirty or misaligned sensor, or issues with the ABS control module.

4. Can I drive with the C1403 code?

While driving is possible, it is not recommended as the ABS and traction control systems may be compromised, increasing the risk of skidding or reduced braking effectiveness.

5. How do I diagnose a C1403 code?

Start by inspecting the rear right wheel speed sensor and its wiring for damage or corrosion. Use a multimeter to check sensor resistance or a scan tool to monitor sensor data in real time.

6. How can I fix the C1403 code?

Repairs may include replacing the faulty wheel speed sensor, cleaning or realigning the sensor, repairing damaged wiring or connectors, or reprogramming the ABS module if needed.

7. How much does it cost to fix a C1403 code?

Costs vary, but replacing a wheel speed sensor typically ranges from $100 to $300, including parts and labor. Wiring repairs or ABS module replacements may cost more.

8. Can a dirty sensor cause a C1403 code?

Yes, debris or dirt on the sensor or tone ring can interfere with the sensor's ability to read wheel speed accurately, triggering the C1403 code.

9. Will clearing the C1403 code solve the issue?

Clearing the code may temporarily turn off the warning light, but the underlying problem must be diagnosed and fixed to prevent the code from returning.

10. Is the C1403 code specific to certain vehicles?

The C1403 code is most commonly associated with vehicles equipped with ABS systems and may vary slightly by manufacturer. Always consult your vehicleâ€™s service manual for specifics.