AutoCodes – GMC – P124E GMC

P124E GMC Code - Cylinder 7 Injector High Control Circuit Shorted to Control Circuit

Quick Answer

The Engine Control Module (ECM) supplies voltage to each fuel injector on the injector high voltage supply circuits. Common causes include Faulty Fuel Injector 7, Fuel Injector 7 harness is open or shorted, Fuel Injector 7 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
P124E GMC indicates Cylinder 7 Injector High Control Circuit Shorted to Control Circuit.
Common causes
Common causes include Faulty Fuel Injector 7, Fuel Injector 7 harness is open or shorted, Fuel Injector 7 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 570
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 23, 2024
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Code P124E GMC Description

The Engine Control Module (ECM) supplies voltage to each fuel injector on the injector high voltage supply circuits. The ECM energizes each fuel injector by grounding the high voltage control circuit of the fuel injector. The ECM monitors the status of the injector high voltage supply circuits and the fuel injector high voltage control circuits. When a fuel injector circuit condition is detected by the ECM, the affected fuel injector(s) is disabled. The Diagnostic Trouble Code (DTC) will be set if the ECM detects the injector high control circuit is shorted to the low control circuit for greater than 2 s.
OBDII Code P124E GMC - Cylinder 7 Injector High Control Circuit Shorted to Control Circuit - AutoCodes.com
P124E GMC Code - Cylinder 7 Injector High Control Circuit Shorted to Control Circuit

What are the Possible Causes of the DTC P124E GMC?

  • Faulty Fuel Injector 7
  • Fuel Injector 7 harness is open or shorted
  • Fuel Injector 7 circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

How to Fix the DTC P124E GMC?

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 P124E GMC 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 P124E GMC code?

Need more information on how to fix the P124E GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P124E 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 P124E GMC Code

1. What are common symptoms of OBDII code P124E GMC related to Cylinder 7 Injector High Control Circuit Shorted to Control Circuit?

- Common symptoms include rough idling, engine misfires, decreased fuel efficiency, and potentially a noticeable decrease in engine performance.

2. What could cause the OBDII code P124E GMC to trigger for Cylinder 7 Injector High Control Circuit Shorted to Control Circuit?

- Possible causes include a short circuit in the control wiring, a faulty injector, issues with the engine control module (ECM), or damaged wiring harnesses.

3. How can I diagnose the OBDII code P124E GMC for Cylinder 7 Injector High Control Circuit Shorted to Control Circuit?

- Diagnosis involves using a scan tool to read the code, inspecting the injector wiring and connections, testing the injector's resistance, and checking for any visible signs of damage or shorts.

4. What are the repair options for addressing OBDII code P124E GMC for Cylinder 7 Injector High Control Circuit Shorted to Control Circuit?

- Repair options may include repairing or replacing damaged wiring, replacing the faulty injector, addressing any issues with the ECM, and clearing the trouble code from the vehicle's system.

5. Can I drive my vehicle with the OBDII code P124E GMC related to Cylinder 7 Injector High Control Circuit Shorted to Control Circuit?

- It is not recommended to drive your vehicle with this code present, as it can lead to further engine damage or poor performance. It's best to address the issue promptly.

6. Are there any precautions I should take when working on the Cylinder 7 Injector High Control Circuit Shorted to Control Circuit issue?

- Ensure the engine is off and cool before attempting any diagnosis or repair work. Use caution when working with electrical components to prevent injury or further damage.

7. How long does it typically take to repair the OBDII code P124E GMC for Cylinder 7 Injector High Control Circuit Shorted to Control Circuit?

- Repair times can vary depending on the exact cause of the issue and the extent of the damage. In some cases, it may be a relatively quick fix, while in others, it could take more time.

8. Is it possible for the OBDII code P124E GMC to come back after repair for Cylinder 7 Injector High Control Circuit Shorted to Control Circuit?

- If the root cause of the issue is not properly addressed during repair, there is a possibility for the code to reoccur. Thorough diagnosis and repair are key to preventing this.

9. Can a DIY enthusiast with basic automotive knowledge fix the OBDII code P124E GMC related to Cylinder 7 Injector High Control Circuit Shorted to Control Circuit?

- Depending on the specific cause, a DIY enthusiast with some automotive knowledge may be able to address this issue themselves, but it's recommended to consult a professional if unsure.

10. Will resetting the trouble codes using a scan tool resolve the OBDII code P124E GMC for Cylinder 7 Injector High Control Circuit Shorted to Control Circuit?

- While clearing the trouble codes may temporarily remove the warning light, it will not fix the underlying issue causing the code. Proper diagnosis and repair are necessary.

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