AutoCodes – Chevrolet – P124A 2017 Chevrolet Silverado

P124A 2017 Chevrolet Silverado Code - Injector 3 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 3, Fuel Injector 3 harness is open or shorted, Fuel Injector 3 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: P124A 2017 Chevrolet Silverado indicates Injector 3 Positive Voltage Control Circuit Shorted to Control Circuit.
Common causes: Common causes include Faulty Fuel Injector 3, Fuel Injector 3 harness is open or shorted, Fuel Injector 3 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 331

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 P124A 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 P124A 2017 Chevrolet Silverado - Injector 3 Positive Voltage Control Circuit Shorted to Control Circuit - AutoCodes.com — P124A 2017 Chevrolet Silverado Code - Injector 3 Positive Voltage Control Circuit Shorted to Control Circuit

What does this mean?

What are the Possible Causes of the DTC P124A 2017 Chevrolet Silverado?

Faulty Fuel Injector 3
Fuel Injector 3 harness is open or shorted
Fuel Injector 3 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P124A 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 P124A 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 P124A 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 P124A 2017 Chevrolet Silverado Code

What does the OBDII code P124A mean on a 2017 Chevrolet Silverado?

P124A indicates that Injector 3's positive voltage control circuit is shorted to the control circuit, affecting the fuel injector's operation.

What are the common symptoms of code P124A in a 2017 Chevrolet Silverado?

Symptoms may include rough idling, misfiring, reduced engine performance, poor fuel efficiency, and the illumination of the check engine light.

What causes the P124A code on a 2017 Chevrolet Silverado?

Common causes include a short in the wiring harness, a malfunctioning fuel injector, a faulty Engine Control Module (ECM), or corroded/damaged electrical connectors.

Can I drive my 2017 Chevrolet Silverado with the P124A code?

Driving with this code is not recommended, as it can lead to poor engine performance, potential engine damage, and unsafe driving conditions.

How do you diagnose the P124A code on a 2017 Chevrolet Silverado?

A mechanic will inspect the wiring and connectors for Injector 3, test the fuel injector for proper operation, and use a scan tool to verify the code and monitor related parameters.

How do you fix the P124A code on a 2017 Chevrolet Silverado?

Repairs may include replacing the faulty fuel injector, repairing or replacing damaged wiring or connectors, or reprogramming/replacing the ECM if necessary.

How much does it cost to repair the P124A code on a 2017 Chevrolet Silverado?

Repair costs can vary widely, ranging from $100-300 for wiring repairs to $500-1000 or more if the injector or ECM needs replacement.

Can a failing fuel injector cause the P124A code on a 2017 Chevrolet Silverado?

Yes, a failing fuel injector can cause this code if it shorts internally or fails to operate due to electrical issues.

What tools are needed to troubleshoot the P124A code?

Common tools include a diagnostic scan tool, a multimeter for testing circuits, and possibly specialized tools for testing or replacing the injector.

Can clearing the P124A code solve the issue?

Clearing the code without addressing the root cause may temporarily turn off the check engine light, but the issue will likely return until proper repairs are made.