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Engine-Codes – Generic – C0039

C0039 Code - Right Rear Tone Wheel

Quick Answer

The C0039 diagnostic trouble code indicates an issue with the right rear tone wheel in the vehicle's ABS (anti-lock braking system) system. Common causes include Damaged or corroded tone wheel, Faulty ABS sensor, Loose or damaged wiring harness connecting the ABS sensor to the vehicle's computer. 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
C0039 indicates Right Rear Tone Wheel.
Common causes
Common causes include Damaged or corroded tone wheel, Faulty ABS sensor, Loose or damaged wiring harness connecting the ABS sensor to the vehicle's computer.
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 09, 2024
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Code C0039 Description

The C0039 diagnostic trouble code indicates an issue with the right rear tone wheel in the vehicle's ABS (anti-lock braking system) system. The tone wheel is a toothed ring that is mounted to the rear wheel hub or axle shaft. It works in conjunction with the ABS sensor to provide the vehicle's onboard computer with information about the speed of the wheel. This information is crucial for the ABS system to function properly and prevent wheel lock-up during braking.

OBDII Code C0039 - Right Rear Tone Wheel
C0039 Code - Right Rear Tone Wheel

Common Causes of C0039

  1. Damaged or corroded tone wheel
  2. Faulty ABS sensor
  3. Loose or damaged wiring harness connecting the ABS sensor to the vehicle's computer
  4. Incorrect air gap between the tone wheel and the ABS sensor
  5. Electronic control unit (ECU) issues

Symptoms of C0039

  1. ABS warning light illuminated on the dashboard
  2. ABS system engages unexpectedly or does not engage at all
  3. Traction control system may be disabled
  4. Braking performance may be affected, especially in slippery conditions
  5. Vehicle may exhibit erratic behavior when braking

How to Fix C0039

  1. Diagnose the specific cause of the issue by using a scan tool to read the ABS system codes and inspecting the right rear tone wheel, ABS sensor, and wiring harness.
  2. Replace the right rear tone wheel if it is damaged or corroded. Ensure that the new tone wheel is properly aligned and secured to the wheel hub or axle shaft.
  3. Replace the ABS sensor if it is faulty. Make sure the new sensor is correctly installed and connected to the wiring harness.
  4. Inspect and repair any damaged or loose wiring in the ABS system. Ensure all connections are secure and free of corrosion.
  5. Clear the ABS system codes and perform a road test to verify that the issue has been resolved.

Cost to Fix C0039

The cost of repairing a right rear tone wheel issue can vary depending on the specific cause of the problem and the make and model of the vehicle. In general, the cost of replacing a tone wheel or ABS sensor can range from $100 to $300, including parts and labor. However, additional costs may be incurred if there are wiring harness issues or other underlying problems. It is recommended to consult with a professional mechanic to get an accurate estimate based on the specific circumstances of the vehicle in question. Labor rates for ABS system repairs typically range from $80 to $150 per hour, but rates may vary based on location and the repair shop's pricing.

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Code C0039 Information for Specific Makes

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 C0039 Code

1. What are the common symptoms of OBDII code C0039 (Right Rear Tone Wheel)?

- Common symptoms include the ABS light coming on, traction control issues, and potential problems with the vehicle's stability control system.

2. What typically causes OBDII code C0039?

- The code C0039 is usually triggered by a faulty or damaged right rear tone wheel, which is a component of the vehicle's ABS system.

3. How can I diagnose a problem with the right rear tone wheel?

- A diagnostic scan tool can help identify the specific wheel speed sensor that is causing the issue. Visual inspection of the tone wheel for damage or debris can also be helpful.

4. Can a dirty tone wheel cause code C0039?

- Yes, a dirty tone wheel can disrupt the signal to the wheel speed sensor and trigger code C0039. Cleaning the tone wheel may resolve the issue in some cases.

5. What are the repair options for OBDII code C0039?

- Repair options include cleaning or replacing the right rear tone wheel, checking and repairing any damaged wiring or connectors, and clearing the code with a diagnostic tool.

6. Can driving with code C0039 cause further damage to the vehicle?

- Continuing to drive with code C0039 may lead to issues with the vehicle's ABS, traction control, and stability control systems. It is recommended to address the problem promptly.

7. How much does it typically cost to repair OBDII code C0039?

- The cost of repairing code C0039 can vary depending on the extent of the issue and the specific repair needed. Costs may range from a simple cleaning to replacing the tone wheel.

8. Is it safe to drive my vehicle with code C0039?

- It is generally not recommended to drive with code C0039, as it can impact the vehicle's safety systems. It is best to address the issue as soon as possible.

9. Can code C0039 be intermittent?

- Yes, code C0039 can be intermittent, especially if the issue is related to a loose connection or debris on the tone wheel. It is important to diagnose and fix the problem to prevent recurrence.

10. Can I reset OBDII code C0039 without repairing the issue?

- While you can clear the code with a diagnostic tool, it is important to address the underlying problem causing code C0039 to prevent safety system malfunctions in the future.

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