AutoCodes – Generic – C1139

C1139 Code - Wheel Speed Sensor Center Tone Ring Missing Tooth Fault

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the Wheel Speed Sensor. Common causes include Faulty Wheel Speed Sensor, Wheel Speed Sensor harness is open or shorted, 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: C1139 indicates Wheel Speed Sensor Center Tone Ring Missing Tooth Fault.
Common causes: Common causes include Faulty Wheel Speed Sensor, Wheel Speed Sensor harness is open or shorted, 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 6,509

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 17, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1139 Description

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

OBDII Code C1139 - Wheel Speed Sensor Center Tone Ring Missing Tooth Fault - AutoCodes.com — C1139 Code - Wheel Speed Sensor Center Tone Ring Missing Tooth Fault

What does this mean?

What are the Possible Causes of the DTC C1139?

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

How to Fix the DTC C1139?

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 C1139 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 C1139 code?

Need more information on how to fix the C1139 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1139 code diagnosed by a professional: Find a repair shop in your area

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 C1139 Code

1. What are the common symptoms of OBDII code C1139 (Wheel Speed Sensor Center Tone Ring Missing Tooth Fault)?

- Common symptoms include ABS or traction control warning lights illuminated on the dashboard, erratic braking behavior, and potential loss of stability control.

2. What can cause the C1139 code to appear?

- The C1139 code is triggered when the vehicle's wheel speed sensor detects a missing tooth on the center tone ring, which can result from physical damage, corrosion, or wear over time.

3. How can I diagnose the C1139 code?

- Diagnosing the C1139 code typically involves inspecting the wheel speed sensors and the center tone ring for any visible damage or missing teeth. A scan tool can be used to pinpoint the exact location of the fault.

4. Is it safe to drive with the C1139 code present?

- It is not recommended to drive with the C1139 code active, as it can affect the proper functioning of the vehicle's ABS, traction control, and stability control systems, potentially compromising safety.

5. How can I repair the Wheel Speed Sensor Center Tone Ring Missing Tooth Fault?

- Repairing the C1139 code often involves replacing the damaged center tone ring or wheel speed sensor, depending on the extent of the issue. It is crucial to ensure proper installation and calibration for accurate sensor readings.

6. Can I reset the C1139 code without fixing the underlying issue?

- While you can clear the code temporarily, it will likely reappear if the root cause of the missing tooth fault is not addressed. Ignoring the issue can lead to further damage and safety concerns.

7. Are there any preventive measures to avoid the C1139 code in the future?

- Regularly inspecting the wheel speed sensors and center tone rings for signs of wear, corrosion, or damage can help prevent the occurrence of the C1139 fault code. Maintaining proper vehicle care and addressing any issues promptly is key.

8. Can a DIY enthusiast resolve the C1139 code at home?

- Depending on your automotive repair skills and access to tools, you may be able to replace the center tone ring or wheel speed sensor yourself. However, if you are unsure, it is best to seek professional assistance to ensure proper repair.

9. Will the C1139 fault code affect my vehicle's performance?

- The C1139 code may impact the performance of your vehicle's braking and stability control systems, potentially leading to reduced safety and handling. It is essential to address this issue promptly to maintain optimal vehicle performance.

10. How long does it typically take to repair the C1139 code?

- The repair time for the C1139 code can vary depending on the extent of the damage and the accessibility of the affected components. In general, a skilled mechanic can resolve this issue within a few hours to a day.