AutoCodes – Generic – P124F

P124F Code - Cylinder 8 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 8, Fuel Injector 8 harness is open or shorted, Fuel Injector 8 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: P124F indicates Cylinder 8 Injector High Control Circuit Shorted to Control Circuit.
Common causes: Common causes include Faulty Fuel Injector 8, Fuel Injector 8 harness is open or shorted, Fuel Injector 8 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.

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Code Popularity 2,985

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 23, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P124F 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 P124F - Cylinder 8 Injector High Control Circuit Shorted to Control Circuit - AutoCodes.com — P124F Code - Cylinder 8 Injector High Control Circuit Shorted to Control Circuit

What does this mean?

What are the Possible Causes of the DTC P124F?

Faulty Fuel Injector 8
Fuel Injector 8 harness is open or shorted
Fuel Injector 8 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P124F?

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 P124F 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 P124F code?

Need more information on how to fix the P124F code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P124F code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P124F Buick — Cylinder 8 Injector High Control Circuit Shorted to Control Circuit
P124F Cadillac — Cylinder 8 Injector High Control Circuit Shorted to Control Circuit
P124F Chevrolet — Cylinder 8 Injector High Control Circuit Shorted to Control Circuit
P124F GMC — Cylinder 8 Injector High Control Circuit Shorted to Control Circuit

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 P124F Code

1. What are the common symptoms of OBDII code P124F?

- Common symptoms include rough idling, misfires, loss of power, and the illumination of the check engine light.

2. What does the OBDII code P124F indicate?

- This code indicates that there is a short circuit between the control circuit and the injector in cylinder 8 of the engine.

3. What are the possible causes of OBDII code P124F?

- Possible causes include damaged wiring, a faulty injector, a malfunctioning engine control module (ECM), or a poor electrical connection.

4. How can I diagnose the issue related to OBDII code P124F?

- To diagnose the issue, you can perform a visual inspection of the wiring, test the injector, check for continuity in the circuit, and use a scan tool to monitor injector operation.

5. Is it safe to drive with OBDII code P124F?

- It is not recommended to drive with this code present, as it can lead to engine performance issues and potential damage if left unresolved.

6. What are the repair options for OBDII code P124F?

- Repair options include repairing or replacing damaged wiring, testing and replacing the faulty injector, addressing any ECM issues, and ensuring proper electrical connections.

7. Can I reset the OBDII code P124F without fixing the underlying issue?

- While you can clear the code with a scan tool, it is important to address the underlying issue causing the code to prevent further damage and ensure proper engine performance.

8. How much does it cost to repair OBDII code P124F?

- The cost of repair can vary depending on the specific cause of the issue, but it may involve costs for parts and labor ranging from $200 to $600 or more.

9. Are there any preventative maintenance tips to avoid OBDII code P124F?

- Regularly inspecting and maintaining the fuel injection system, ensuring proper electrical connections, and addressing any engine performance issues promptly can help prevent this code from occurring.

10. Can a DIY enthusiast fix OBDII code P124F at home?

- Depending on your skill level and access to tools, you may be able to diagnose and repair this issue at home. However, if you are unsure, it is recommended to seek professional help to avoid further damage.