AutoCodes – Chevrolet – P124C 2017 Chevrolet Silverado

P124C 2017 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 2017 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.

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Code Popularity 307

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Aug 12, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P124C 2017 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 2017 Chevrolet Silverado - Injector 5 Positive Voltage Control Circuit Shorted to Control Circuit - AutoCodes.com — P124C 2017 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 2017 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 2017 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 2017 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 2017 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 P124C 2017 Chevrolet Silverado Code

What does the OBDII code P124C mean on a 2017 Chevrolet Silverado?

The P124C code indicates that Injector 5's positive voltage control circuit is shorted to its control circuit, affecting proper injector operation.

What are the common symptoms of code P124C in a 2017 Chevrolet Silverado?

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

What causes the P124C code to appear?

This code can be caused by damaged wiring, a faulty injector, a short circuit, or a malfunctioning engine control module (ECM).

How can I diagnose the P124C code?

Start by inspecting the wiring and connectors for damage or corrosion. Test the injector and circuit for continuity and proper voltage using a multimeter.

Can I drive my Silverado with the P124C code active?

Driving with this code is not recommended, as it can lead to poor engine performance, increased emissions, or further damage to the engine.

How do I fix the P124C code on a 2017 Chevrolet Silverado?

Repairs may involve fixing or replacing damaged wiring, cleaning or replacing the injector, or reprogramming or replacing the ECM if necessary.

What tools are needed to fix the P124C code?

You may need a multimeter, diagnostic scanner, and basic hand tools to inspect and repair wiring or replace components.

How much does it cost to fix the P124C code?

Repair costs vary but may range from $100 to $500 depending on whether the issue is with wiring, the injector, or the ECM.

Can a faulty fuel injector cause code P124C?

Yes, a malfunctioning fuel injector can cause this code by creating an electrical short or failing to operate correctly.

How can I prevent code P124C from occurring again?

Regular maintenance, such as inspecting wiring harnesses, keeping injectors clean, and addressing engine issues promptly, can help prevent this code from reappearing.