Engine-Codes.com
Engine-Codes – GMC – P124D GMC

P124D GMC Code - Injector 6 Positive Voltage Control Circuit Shorted to Control Circuit

Quick Answer

The P124D diagnostic trouble code for GMC vehicles indicates that there is a short circuit between the positive voltage control circuit and the control circuit for injector 6. Common causes include Wiring harness damage or corrosion, Faulty fuel injector, Issues with the engine control module (ECM). 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
P124D GMC indicates Injector 6 Positive Voltage Control Circuit Shorted to Control Circuit.
Common causes
Common causes include Wiring harness damage or corrosion, Faulty fuel injector, Issues with the engine control module (ECM).
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 10, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P124D GMC Description

The P124D diagnostic trouble code for GMC vehicles indicates that there is a short circuit between the positive voltage control circuit and the control circuit for injector 6. In simpler terms, this means that there is an issue with the electrical connection that controls the fuel injector for cylinder 6 in the engine. The fuel injector is responsible for delivering the appropriate amount of fuel into the combustion chamber for efficient combustion.

OBDII Code P124D GMC - Injector 6 Positive Voltage Control Circuit Shorted to Control Circuit
P124D GMC Code - Injector 6 Positive Voltage Control Circuit Shorted to Control Circuit

Common Causes of P124D GMC

  1. Wiring harness damage or corrosion
  2. Faulty fuel injector
  3. Issues with the engine control module (ECM)
  4. Short circuit due to water intrusion
  5. Poor electrical connections

Symptoms of P124D GMC

  1. Poor fuel economy
  2. Rough idling
  3. Misfires
  4. Hesitation
  5. Lack of power

How to Fix P124D GMC

  1. Diagnose the issue using a scan tool to confirm the P124D code and pinpoint the exact location of the short circuit.
  2. Inspect the wiring harness for any damage or corrosion. Repair or replace any affected wiring.
  3. Test the fuel injector for proper operation. Replace if necessary.
  4. Check the engine control module for any faults. Repair or replace as needed.
  5. Clear the trouble code and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P124D GMC

The cost of repairing a P124D code can vary depending on the extent of the damage and the specific parts that need to be replaced. On average, the repair for this issue can range from $200 to $500, including parts and labor. However, it's important to note that labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate.

Need more information about the P124D GMC code?

Need more information on how to fix the P124D GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P124D GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

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 P124D GMC Code

1. What are the common symptoms of OBDII code P124D GMC?

Common symptoms of this code may include rough idling, engine misfires, poor acceleration, and potentially decreased fuel efficiency.

2. What can cause the Injector 6 Positive Voltage Control Circuit to short to the Control Circuit?

Possible causes for this issue can be a damaged injector, wiring harness issues, a faulty ECM, or a short circuit in the control circuit.

3. How do I diagnose the Injector 6 Positive Voltage Control Circuit shorted to Control Circuit problem?

Diagnosis involves using a multimeter to check the resistance of the injector circuit, inspecting the wiring for damage, and testing the ECM for proper functioning.

4. Can I drive my vehicle with OBDII code P124D GMC?

It is not recommended to drive your vehicle with this code present, as it can lead to further damage to the engine or emissions system.

5. How can I repair the Injector 6 Positive Voltage Control Circuit shorted to Control Circuit issue?

Repairing this problem involves replacing the damaged injector, repairing any wiring issues, and potentially reprogramming or replacing the ECM.

6. Is it safe to ignore OBDII code P124D GMC?

Ignoring this code can lead to poor engine performance, potential damage to other components, and may cause your vehicle to fail emissions tests.

7. Is there a way to prevent the Injector 6 Positive Voltage Control Circuit shorted to Control Circuit problem?

Regular maintenance and inspections can help prevent this issue, along with avoiding rough driving conditions that can cause damage to the injector system.

8. Can a DIY enthusiast fix the Injector 6 Positive Voltage Control Circuit shorted to Control Circuit problem?

While some experienced DIY enthusiasts may be able to diagnose and repair this issue, it is recommended to seek help from a professional mechanic due to the complexity of the repair.

9. What are the potential long-term effects of ignoring OBDII code P124D GMC?

Ignoring this code can lead to permanent damage to the engine, increased repair costs, and potential safety hazards if the issue worsens.

10. How much does it typically cost to repair OBDII code P124D GMC at a repair shop?

Repair costs for this code can vary depending on the exact cause of the issue, but it is advisable to budget for several hundred dollars for parts and labor.

Discuss the causes and fixes for P124D GMC OBDII Code

Submit a New Comment

Code P124D GMC comments

No comments found for this page.