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Engine-Codes – Generic – C0279

C0279 Code - Short to B+ in ABS Solenoid Relay Circuit

Quick Answer

The C0279 code indicates that there is a short to B+ (battery positive) in the ABS solenoid relay circuit. Common causes include Faulty ABS solenoid relay, Damaged wiring or connectors in the ABS solenoid relay circuit, Corrosion in the ABS system components. 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
C0279 indicates Short to B+ in ABS Solenoid Relay Circuit.
Common causes
Common causes include Faulty ABS solenoid relay, Damaged wiring or connectors in the ABS solenoid relay circuit, Corrosion in the ABS system components.
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 Aug 19, 2024
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Code C0279 Description

The C0279 code indicates that there is a short to B+ (battery positive) in the ABS solenoid relay circuit. This means that there is an electrical issue in the circuit that controls the ABS solenoid relay, which is responsible for regulating the flow of brake fluid in the ABS system. This can lead to problems with the vehicle's anti-lock braking system, affecting its ability to effectively control wheel speed during braking.

OBDII Code C0279 - Short to B+ in ABS Solenoid Relay Circuit
C0279 Code - Short to B+ in ABS Solenoid Relay Circuit

Common Causes of C0279

  1. Faulty ABS solenoid relay
  2. Damaged wiring or connectors in the ABS solenoid relay circuit
  3. Corrosion in the ABS system components
  4. Malfunctioning ABS control module
  5. Improper installation of ABS components

Symptoms of C0279

  1. Illuminated ABS warning light on the dashboard
  2. Loss of ABS functionality
  3. Increased stopping distance during braking
  4. Vehicle pulling to one side during braking
  5. Unusual noises coming from the ABS system

How to Fix C0279

  1. Diagnose the specific cause of the short to B+ in the ABS solenoid relay circuit using a diagnostic scanner
  2. Inspect the wiring and connectors for any damage or corrosion
  3. Test the ABS solenoid relay for proper functionality and replace if necessary
  4. Clear the diagnostic trouble codes and test drive the vehicle to ensure the issue has been resolved
  5. If the problem persists, further troubleshooting may be required to identify the root cause

Cost to Fix C0279

The typical repair costs for addressing a short to B+ in the ABS solenoid relay circuit can vary depending on the extent of the issue and the specific parts that need to be replaced. On average, this repair could cost anywhere from $200 to $500, including parts and labor. However, as mentioned earlier, labor rates at auto repair shops can vary, so it's recommended to obtain quotes from multiple shops to get a more accurate estimate.

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Code C0279 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 C0279 Code

1. What are the common symptoms of OBDII code C0279?

The common symptoms of OBDII code C0279 (Short to B+ in ABS Solenoid Relay Circuit) include the ABS warning light illuminating on the dashboard, potential loss of ABS functionality, and possible issues with brake performance.

2. What usually causes OBDII code C0279 to trigger?

The OBDII code C0279 is typically triggered by a short to battery voltage in the ABS solenoid relay circuit. This can be caused by damaged wiring, a faulty relay, or a malfunctioning ABS control module.

3. How can I diagnose the source of OBDII code C0279?

Diagnosing OBDII code C0279 involves using a scan tool to retrieve the code, inspecting the ABS solenoid relay circuit for any visible damage or corrosion, and testing the relay and wiring for continuity and proper function.

4. What are the repair options for OBDII code C0279?

Repair options for OBDII code C0279 may include repairing or replacing damaged wiring, replacing the faulty relay, or addressing any issues with the ABS control module. It is recommended to follow the manufacturer's diagnostic and repair procedures.

5. Can I continue driving with OBDII code C0279 present?

While it may be possible to continue driving with OBDII code C0279 present, it is not recommended as it could compromise the functionality of the ABS system, potentially affecting the vehicle's braking performance and safety.

6. How serious is OBDII code C0279?

OBDII code C0279 should be taken seriously as it indicates a fault in the ABS solenoid relay circuit, which is a crucial component of the vehicle's ABS system. Ignoring this code can lead to safety risks and compromised braking performance.

7. Can I reset OBDII code C0279 without fixing the underlying issue?

Resetting OBDII code C0279 without addressing the underlying issue will only temporarily clear the code. The issue will persist, and the code is likely to reappear until the root cause is properly diagnosed and repaired.

8. Is it safe to attempt DIY repairs for OBDII code C0279?

DIY repairs for OBDII code C0279 can be attempted if you have the necessary tools, knowledge, and experience working on automotive electrical systems. However, if you are unsure or uncomfortable with the repair process, it is recommended to seek professional assistance.

9. How much does it cost to fix OBDII code C0279?

The cost of fixing OBDII code C0279 can vary depending on the underlying issue, the extent of the repair needed, and labor rates in your area. It is advisable to obtain quotes from reputable automotive repair shops for an accurate estimate.

10. Can OBDII code C0279 affect other systems in the vehicle?

While OBDII code C0279 specifically pertains to the ABS solenoid relay circuit, a malfunction in this system can potentially impact other vehicle systems, such as stability control or traction control, that rely on ABS functionality for proper operation.

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