AutoCodes – Chevrolet – P124C 2016 Chevrolet Silverado

P124C 2016 Chevrolet Silverado Code - Injector 5 Positive Voltage 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 5, Fuel Injector 5 harness is open or shorted, Fuel Injector 5 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: P124C 2016 Chevrolet Silverado indicates Injector 5 Positive Voltage Control Circuit Shorted to Control Circuit.
Common causes: Common causes include Faulty Fuel Injector 5, Fuel Injector 5 harness is open or shorted, Fuel Injector 5 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 304

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 Aug 12, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P124C 2016 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 P124C 2016 Chevrolet Silverado - Injector 5 Positive Voltage Control Circuit Shorted to Control Circuit - AutoCodes.com — P124C 2016 Chevrolet Silverado Code - Injector 5 Positive Voltage Control Circuit Shorted to Control Circuit

What does this mean?

What are the Possible Causes of the DTC P124C 2016 Chevrolet Silverado?

Faulty Fuel Injector 5
Fuel Injector 5 harness is open or shorted
Fuel Injector 5 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P124C 2016 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 P124C 2016 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 P124C 2016 Chevrolet Silverado code?

Need more information on how to fix the P124C 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P124C 2016 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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 P124C 2016 Chevrolet Silverado Code

What does the OBDII code P124C mean for a 2016 Chevrolet Silverado?

P124C indicates that there is an issue with the positive voltage control circuit of injector 5, specifically a short to the control circuit.

What are the common symptoms of code P124C in a 2016 Chevrolet Silverado?

Symptoms may include engine misfires, reduced performance, rough idling, poor fuel economy, or the check engine light being illuminated.

What causes the P124C code to appear in a 2016 Chevrolet Silverado?

The most common causes are damaged wiring or connectors near injector 5, a short circuit in the injector wiring, or a faulty injector.

Can I drive my 2016 Chevrolet Silverado with a P124C code?

While it may be possible to drive, doing so can lead to further engine damage, reduced performance, and increased fuel consumption. Itâ€™s best to address the issue promptly.

How can I diagnose the P124C code on my Silverado?

Start by inspecting the wiring and connectors for injector 5. Use a multimeter to check for continuity or short circuits in the harness, and test the injectorâ€™s resistance.

What tools do I need to fix a P124C code on a 2016 Chevy Silverado?

Youâ€™ll need a diagnostic scanner, multimeter, basic hand tools, and possibly replacement wiring or an injector, depending on the root cause.

Does a faulty injector always cause the P124C code?

No, while a faulty injector is a possible cause, the issue may also stem from damaged wiring, corroded connectors, or a problem in the engine control module (ECM).

How much does it cost to repair a P124C code for a 2016 Chevrolet Silverado?

Repair costs vary depending on the issue. Replacing a damaged wire or connector may cost $50-$100, while replacing an injector could cost $200-$500, including labor.

Can a bad ECM cause the P124C code on a Silverado?

Yes, although itâ€™s less common, a malfunctioning ECM could fail to properly control the injector circuits, triggering the P124C code.

How can I prevent the P124C code from occurring again?

Regularly inspect and maintain the wiring and connectors in the engine bay, avoid exposing components to excessive moisture or heat, and use high-quality fuel to prevent injector issues.