AutoCodes – Generic – C103D

C103D Code - Rear Wheel Speed Sensor Signal Erratic Performance

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the Rear Wheel Speed Sensor. Common causes include Faulty Rear Wheel Speed Sensor, Rear Wheel Speed Sensor harness is open or shorted, Rear Wheel Speed Sensor 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: C103D indicates Rear Wheel Speed Sensor Signal Erratic Performance.
Common causes: Common causes include Faulty Rear Wheel Speed Sensor, Rear Wheel Speed Sensor harness is open or shorted, Rear Wheel Speed Sensor 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.

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Code Popularity 7,701

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 Aug 06, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C103D Description

The Anti-Lock Brake System (ABS) Module monitors the Rear Wheel Speed Sensor. The ABS Module sets the OBDII code when the Rear Wheel Speed Sensor is not to factory specifications.

OBDII Code C103D - Rear Wheel Speed Sensor Signal Erratic Performance - AutoCodes.com — C103D Code - Rear Wheel Speed Sensor Signal Erratic Performance

What does this mean?

What are the Possible Causes of the DTC C103D?

Faulty Rear Wheel Speed Sensor
Rear Wheel Speed Sensor harness is open or shorted
Rear Wheel Speed Sensor circuit poor electrical connection

How to Fix the DTC C103D?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C103D 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 C103D code?

Need more information on how to fix the C103D code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C103D code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C103D Chrysler — Rear Wheel Speed Sensor Signal Erratic Performance
C103D Dodge — Rear Wheel Speed Sensor Signal Erratic Performance
C103D Jeep — Rear Wheel Speed Sensor Signal Erratic Performance

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 C103D Code

1. What are the common symptoms of OBDII code C103D (Rear Wheel Speed Sensor Signal Erratic Performance)?

- Common symptoms include ABS warning light illuminated on the dashboard, traction control system malfunctions, and erratic behavior while braking.

2. What could cause the OBDII code C103D to trigger?

- The code may be triggered by a faulty rear wheel speed sensor, damaged wiring or connectors, wheel bearing issues, or problems with the ABS control module.

3. How can I diagnose the root cause of OBDII code C103D?

- To diagnose the issue, you can use a diagnostic scan tool to read the code, visually inspect the rear wheel speed sensor and its wiring for damage, and perform a test drive to observe the sensor's performance.

4. Can I still drive my vehicle with the OBDII code C103D active?

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

5. How can I repair OBDII code C103D (Rear Wheel Speed Sensor Signal Erratic Performance)?

- Repair options include replacing the faulty rear wheel speed sensor, repairing damaged wiring or connectors, addressing wheel bearing issues, or reprogramming the ABS control module.

6. Is it possible to reset the OBDII code C103D without fixing the underlying issue?

- While clearing the code temporarily using a diagnostic tool is possible, it is essential to address the root cause to prevent the code from reoccurring and ensure the proper functioning of the ABS system.

7. Can extreme weather conditions affect the rear wheel speed sensor performance and trigger OBDII code C103D?

- Yes, extreme weather conditions such as heavy rain, snow, or extreme temperatures can impact the rear wheel speed sensor's performance and trigger the code.

8. How long does it typically take to repair OBDII code C103D?

- The repair time can vary depending on the exact cause of the issue. Simple fixes like replacing a sensor or repairing wiring may take a few hours, while more complex issues could take longer.

9. Are there any preventative maintenance tips to avoid OBDII code C103D in the future?

- Regularly inspecting and maintaining the ABS system components, including the wheel speed sensors and wiring, can help prevent issues that may trigger code C103D.

10. Can a DIY enthusiast with basic automotive knowledge repair OBDII code C103D?

- Depending on the specific cause, a DIY enthusiast with basic automotive knowledge may be able to address some issues related to code C103D, such as replacing a sensor or repairing wiring. However, more complex problems may require professional assistance.