AutoCodesChevrolet – P124C 2014 Chevrolet Silverado

P124C 2014 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 2014 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 691
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 P124C 2014 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 2014 Chevrolet Silverado - Injector 5 Positive Voltage Control Circuit Shorted to Control Circuit - AutoCodes.com
P124C 2014 Chevrolet Silverado Code - Injector 5 Positive Voltage Control Circuit Shorted to Control Circuit

What are the Possible Causes of the DTC P124C 2014 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 2014 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 2014 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 2014 Chevrolet Silverado code?

Need more information on how to fix the P124C 2014 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 P124C 2014 Chevrolet Silverado Code

What does the OBDII code P124C mean for a 2014 Chevrolet Silverado?

The P124C code indicates that Injector 5 Positive Voltage Control Circuit is shorted to the control circuit, causing issues with proper fuel injection.

What are the common symptoms of code P124C?

Symptoms may include rough idling, misfires, reduced engine performance, poor fuel economy, and a check engine light.

What causes the P124C code to appear?

This code is typically caused by a short circuit in the wiring or connectors for Injector 5, a faulty injector, or issues with the powertrain control module (PCM).

How can I diagnose code P124C on my Silverado?

Inspect the wiring and connectors for Injector 5 for damage or short circuits, test the injector for proper operation, and check the PCM for faults.

Can I drive my 2014 Silverado with code P124C?

It’s not recommended to drive with this code as it can lead to engine misfires and potential damage to other components.

How do I fix code P124C on a 2014 Chevrolet Silverado?

Repairs may include replacing damaged wiring, connectors, or Injector 5, and reprogramming or replacing the PCM if necessary.

Does code P124C affect fuel efficiency?

Yes, this code can result in poor fuel economy due to improper fuel delivery from Injector 5.

Is code P124C specific to Injector 5?

Yes, this code specifically relates to the positive voltage control circuit for Injector 5 in the engine.

How much does it typically cost to fix code P124C?

Repair costs can vary widely depending on the issue, ranging from $100 for wiring repairs to over $500 for injector or PCM replacement.

Can a faulty PCM cause code P124C?

Yes, a malfunctioning PCM can fail to properly control Injector 5, potentially triggering this code.

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