P124C 2015 GMC Sierra Code - Injector 5 Positive Voltage Control Circuit Shorted to Control Circuit
Quick Answer
The P124C diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates a problem with the Injector 5 Positive Voltage Control Circuit being shorted to the Control Circuit. Common causes include Short circuit in the wiring harness, Faulty fuel injector, Issues with the Engine Control Module (ECM). 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 2015 GMC Sierra indicates Injector 5 Positive Voltage Control Circuit Shorted to Control Circuit.
- Common causes
- Common causes include Short circuit in the wiring harness, Faulty fuel injector, Issues with the Engine Control Module (ECM).
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P124C 2015 GMC Sierra Description
The P124C diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates a problem with the Injector 5 Positive Voltage Control Circuit being shorted to the Control Circuit. In simpler terms, this means that there is an electrical issue related to the fuel injector for cylinder 5 in the engine. The fuel injector is responsible for delivering the right amount of fuel into the combustion chamber at the correct time. When this circuit is shorted, it can disrupt the injector's operation, leading to potential performance issues.
Common Causes of P124C 2015 GMC Sierra
- Short circuit in the wiring harness
- Faulty fuel injector
- Issues with the Engine Control Module (ECM)
- Corrosion in the electrical connections
Symptoms of P124C 2015 GMC Sierra
- Engine misfires
- Rough idling
- Poor acceleration
- Decreased fuel efficiency
- Stalling
How to Fix P124C 2015 GMC Sierra
- Begin by conducting a thorough visual inspection of the wiring harness, fuel injector, and electrical connections to identify any visible damage or corrosion.
- Use a multimeter to test the voltage and continuity of the Injector 5 Positive Voltage Control Circuit to pinpoint the location of the short circuit.
- If a faulty fuel injector is suspected, remove and replace the injector for cylinder 5.
- Check and repair any damaged wiring or connectors in the circuit.
- Clear the DTC using a diagnostic scan tool and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P124C 2015 GMC Sierra
The typical repair costs for addressing a P124C code on a 2015 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a fuel injector can cost between $150 and $300, while addressing wiring or connector issues may range from $100 to $200. Labor costs can add an additional $80 to $150 per hour. Overall, the total repair cost for this issue could range from $300 to $600 or more, depending on the extent of the repairs needed. It's recommended to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on your vehicle's specific needs.
Need more information about the P124C 2015 GMC Sierra code?
Need more information on how to fix the P124C 2015 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P124C 2015 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P124C 2015 GMC Sierra Code
1. What does the OBDII code P124C mean on a 2015 GMC Sierra?
P124C indicates that the Injector 5 Positive Voltage Control Circuit is shorted to the control circuit, meaning there is an electrical issue affecting the fifth fuel injector.
2. What are the common symptoms of code P124C on a 2015 GMC Sierra?
Symptoms may include rough idling, misfiring, reduced engine power, poor fuel economy, or the Check Engine Light being illuminated.
3. What causes the P124C code to appear on a 2015 GMC Sierra?
Common causes include a short circuit in the injector wiring, a damaged or faulty injector, poor electrical connections, or a malfunctioning powertrain control module (PCM).
4. Can I keep driving my 2015 GMC Sierra with the P124C code?
It’s not recommended to drive the vehicle for an extended period with this code, as it can lead to further engine damage or reduced performance.
5. How do I diagnose the P124C code on a 2015 GMC Sierra?
Diagnosis typically involves inspecting the wiring and connectors for Injector 5, testing the injector itself, and using a multimeter to check for shorts or open circuits.
6. How can I fix the P124C code on a 2015 GMC Sierra?
Repairs may involve replacing the faulty injector, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the PCM if necessary.
7. How much does it cost to repair the P124C code on a 2015 GMC Sierra?
The cost depends on the specific issue but can range from $150 to $500 for wiring repairs or injector replacement, and more for PCM-related issues.
8. Can a bad PCM cause the P124C code on a 2015 GMC Sierra?
Yes, a malfunctioning PCM can cause this code, though it’s less common than wiring or injector issues. It should only be replaced after ruling out other causes.
9. How can I prevent the P124C code from reoccurring on my 2015 GMC Sierra?
Regularly inspect and maintain the fuel injector wiring harness, ensure proper electrical connections, and address any engine performance issues promptly.
10. Is the P124C code specific to Injector 5 on a 2015 GMC Sierra?
Yes, this code specifically refers to an electrical issue with the positive voltage control circuit for Injector 5.
Discuss the causes and fixes for P124C 2015 GMC Sierra OBDII Code
Code P124C 2015 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.