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Engine-Codes – Hummer – C0247 Hummer

C0247 Hummer Code - Left Front Isolation Solenoid Circuit Shorted

Quick Answer

The C0247 diagnostic trouble code (DTC) for Hummer vehicles indicates a problem with the Left Front Isolation Solenoid Circuit being shorted. Common causes include Wiring harness or connector damage or corrosion, Faulty isolation solenoid, Short circuit in the isolation solenoid circuit. 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
C0247 Hummer indicates Left Front Isolation Solenoid Circuit Shorted.
Common causes
Common causes include Wiring harness or connector damage or corrosion, Faulty isolation solenoid, Short circuit in the isolation solenoid circuit.
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 13, 2024
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Code C0247 Hummer Description

The C0247 diagnostic trouble code (DTC) for Hummer vehicles indicates a problem with the Left Front Isolation Solenoid Circuit being shorted. The isolation solenoid is a crucial component of the vehicle's anti-lock braking system (ABS). The purpose of the isolation solenoid is to control the flow of brake fluid to the left front wheel during ABS operation. When the ABS system detects wheel slip, it modulates the brake pressure to prevent the wheel from locking up.

OBDII Code C0247 Hummer - Left Front Isolation Solenoid Circuit Shorted
C0247 Hummer Code - Left Front Isolation Solenoid Circuit Shorted

Common Causes of C0247 Hummer

  1. Wiring harness or connector damage or corrosion.
  2. Faulty isolation solenoid.
  3. Short circuit in the isolation solenoid circuit.
  4. ABS control module malfunction.
  5. Electrical issues such as a blown fuse or relay failure.

Symptoms of C0247 Hummer

  1. ABS warning light illuminated on the dashboard.
  2. Erratic braking behavior, such as pulsating brake pedal.
  3. Reduced braking performance, especially during hard braking or slippery road conditions.
  4. Increased stopping distance.
  5. ABS system may engage unexpectedly or fail to engage when needed.

How to Fix C0247 Hummer

  1. Begin by conducting a visual inspection of the wiring harness and connectors for any damage or corrosion. Repair or replace any damaged components.
  2. Test the isolation solenoid for proper operation using a multimeter. Replace the solenoid if it is found to be faulty.
  3. Check for any short circuits in the isolation solenoid circuit and repair as necessary.
  4. Inspect the ABS control module for any malfunctions and replace if needed.
  5. Clear the DTC with a scan tool and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix C0247 Hummer

The cost of repairing a shorted Left Front Isolation Solenoid Circuit on a Hummer can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. On average, the repair costs for this type of issue can range from $200 to $500, including parts and labor. It is important to note that diagnostic time and labor rates can vary, so it is advisable to check with local auto repair shops for a more accurate estimate.

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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 C0247 Hummer Code

1. What are the common symptoms of OBDII code C0247 Hummer (Left Front Isolation Solenoid Circuit Shorted)?

The common symptoms include the illumination of the "Service Stability System" warning light, erratic ABS operation, and potential loss of stability control.

2. What can cause the OBDII code C0247 Hummer to appear?

This code is usually triggered by a short circuit in the left front isolation solenoid circuit, which may be caused by damaged wiring, a faulty solenoid, or a corroded connector.

3. How can I diagnose the cause of OBDII code C0247 Hummer?

To diagnose the issue, you may need to perform a visual inspection of the wiring and connectors, test the left front isolation solenoid, and use a diagnostic scanner to retrieve additional fault codes.

4. What are some repair tips for fixing OBDII code C0247 Hummer?

Repairing this code may involve repairing or replacing damaged wiring, cleaning corroded connectors, testing and replacing the left front isolation solenoid if necessary, and clearing the trouble codes.

5. Can I drive my Hummer with OBDII code C0247 present?

It is not recommended to drive your vehicle with this code active, as it may affect the stability control system and compromise your safety on the road.

6. How much does it typically cost to repair OBDII code C0247 Hummer?

The cost of repair can vary depending on the extent of the damage and the parts needed, but it may range from $100 to $300 for parts and labor.

7. Can I clear the OBDII code C0247 Hummer without fixing the issue?

Clearing the code without addressing the underlying problem will only temporarily turn off the warning light, but the issue will likely reappear until properly repaired.

8. Is OBDII code C0247 Hummer a serious problem?

While this code may not cause immediate drivability issues, it can affect the stability control system, potentially compromising your vehicle's safety and performance.

9. How long does it take to repair OBDII code C0247 Hummer?

The repair time can vary depending on the exact cause of the code, but it typically takes a few hours to diagnose and fix the issue.

10. Can I fix OBDII code C0247 Hummer myself?

If you have the necessary tools, knowledge, and experience working on automotive electrical systems, you may be able to diagnose and repair this code yourself. Otherwise, it's best to seek professional help.

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