AutoCodes – Chevrolet – P124A 2018 Chevrolet Silverado

P124A 2018 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 2018 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 543

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 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 P124A 2018 Chevrolet Silverado - Injector 3 Positive Voltage Control Circuit Shorted to Control Circuit - AutoCodes.com — P124A 2018 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 2018 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 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 P124A 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 P124A 2018 Chevrolet Silverado code?

Need more information on how to fix the P124A 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P124A in a 2018 Chevrolet Silverado?

The common symptoms of OBDII code P124A in a 2018 Chevrolet Silverado include rough idling, engine misfires, decreased fuel efficiency, and potential stalling.

2. What does the OBDII code P124A mean for a 2018 Chevrolet Silverado?

OBDII code P124A for a 2018 Chevrolet Silverado indicates that there is a short circuit between the positive voltage control circuit of injector 3 and the control circuit.

3. What are the possible causes of OBDII code P124A in a 2018 Chevrolet Silverado?

Possible causes of OBDII code P124A in a 2018 Chevrolet Silverado include damaged wiring, faulty injector 3, a malfunctioning PCM (powertrain control module), or a poor electrical connection.

4. How can I diagnose the OBDII code P124A in my 2018 Chevrolet Silverado?

To diagnose OBDII code P124A in a 2018 Chevrolet Silverado, you can use a diagnostic scanner to read the code, visually inspect the wiring and connectors related to injector 3, and perform voltage tests to pinpoint the issue.

5. Can I continue driving my 2018 Chevrolet Silverado with OBDII code P124A?

It is not recommended to continue driving your 2018 Chevrolet Silverado with OBDII code P124A, as it can lead to further damage to the engine and components. It is best to address the issue promptly.

6. How can I repair OBDII code P124A in my 2018 Chevrolet Silverado?

Repairing OBDII code P124A in a 2018 Chevrolet Silverado may involve replacing damaged wiring, repairing or replacing injector 3, checking and fixing electrical connections, or resetting the PCM after resolving the issue.

7. Is OBDII code P124A a serious issue in a 2018 Chevrolet Silverado?

OBDII code P124A in a 2018 Chevrolet Silverado should be addressed promptly, as it can cause drivability issues and potential damage to the engine if left unresolved. Ignoring the code may lead to more severe problems.

8. Can a DIY enthusiast fix OBDII code P124A in a 2018 Chevrolet Silverado?

DIY enthusiasts with automotive repair experience may be able to address OBDII code P124A in a 2018 Chevrolet Silverado by following repair guides and utilizing the necessary tools. However, complex electrical issues may require professional assistance.

9. How much does it cost to repair OBDII code P124A in a 2018 Chevrolet Silverado?

The cost to repair OBDII code P124A in a 2018 Chevrolet Silverado can vary depending on the exact cause of the issue, parts needed for replacement, and labor costs. It is advisable to obtain quotes from reputable mechanics or repair shops.

10. Can OBDII code P124A reappear in my 2018 Chevrolet Silverado after repair?

If the underlying issue causing OBDII code P124A in a 2018 Chevrolet Silverado is not resolved properly, the code may reappear. It is essential to conduct thorough diagnostics and ensure all related components are functioning correctly to prevent a recurrence.