AutoCodesChevrolet – P124F 2018 Chevrolet Silverado

P124F 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 586
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 12, 2022
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Code P124F 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado - Cylinder 8 Injector High Control Circuit Shorted to Control Circuit - AutoCodes.com
P124F 2018 Chevrolet Silverado Code - Cylinder 8 Injector High Control Circuit Shorted to Control Circuit

What are the Possible Causes of the DTC P124F 2018 Chevrolet Silverado?

  • 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 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado code?

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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 P124F 2018 Chevrolet Silverado Code

What does OBDII code P124F mean for a 2018 Chevrolet Silverado?

Code P124F indicates that the Cylinder 8 injector high control circuit is shorted to the control circuit, which affects the proper operation of the fuel injector.

What are the common symptoms of code P124F in a 2018 Chevrolet Silverado?

Common symptoms include rough engine idle, reduced engine performance, misfires, poor fuel economy, and the check engine light turning on.

What causes code P124F to appear on a 2018 Chevrolet Silverado?

The code can be caused by damaged wiring or connectors, a short circuit in the injector control circuit, a faulty injector, or issues with the engine control module (ECM).

Can I drive my 2018 Chevrolet Silverado with code P124F?

Driving with code P124F is not recommended as it can lead to engine performance issues and potential damage to other components over time.

How can I diagnose code P124F on a 2018 Chevrolet Silverado?

Start by inspecting the wiring and connectors for Cylinder 8’s injector, testing the injector itself, and checking for short circuits in the control circuit. Use a multimeter for continuity testing.

What tools are needed to fix code P124F on a 2018 Chevrolet Silverado?

You may need a multimeter, wiring diagrams, a scan tool, and basic hand tools to inspect, test, and replace the injector or related components.

How do I fix code P124F on a 2018 Chevrolet Silverado?

Repair or replace damaged wiring and connectors, replace the injector if it’s faulty, and address any ECM-related issues if necessary.

How much does it cost to repair code P124F on a 2018 Chevrolet Silverado?

Repair costs can vary, ranging from $100 to $500 depending on whether wiring repairs, injector replacement, or ECM programming is required.

Can a faulty ECM cause code P124F in a 2018 Chevrolet Silverado?

Yes, a malfunctioning ECM can misinterpret signals or fail to control the injector properly, leading to this code.

How do I prevent code P124F from recurring in my 2018 Chevrolet Silverado?

Regularly inspect and maintain the wiring, connectors, and injectors, and address electrical issues promptly to prevent recurrence.

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