P124C 2016 GMC Sierra 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 2016 GMC Sierra 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.
Code P124C 2016 GMC Sierra Description
What are the Possible Causes of the DTC P124C 2016 GMC Sierra?
- 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 2016 GMC Sierra?
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 2016 GMC Sierra 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 2016 GMC Sierra code?
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Frequently Asked Questions about P124C 2016 GMC Sierra Code
1. What does OBDII code P124C mean for a 2016 GMC Sierra?
P124C indicates that the Injector 5 Positive Voltage Control Circuit is shorted to the control circuit, which disrupts proper fuel delivery.
2. What are the common symptoms of code P124C?
Symptoms may include rough idle, engine misfire, reduced fuel efficiency, poor acceleration, and possibly an illuminated check engine light.
3. What causes code P124C to appear?
Common causes include damaged wiring, a short circuit in the injector 5 wiring harness, a faulty injector, or a malfunctioning engine control module (ECM).
4. How do I diagnose P124C on my 2016 GMC Sierra?
Start by inspecting the wiring and connectors for injector 5 for damage or corrosion. Use a multimeter to check for continuity and shorts in the circuit. If no wiring issues are found, test the injector and ECM.
5. Can a bad injector cause code P124C?
Yes, a faulty injector can cause this code if it creates a short in the circuit or fails to operate correctly.
6. Is code P124C serious, and can I drive with it?
While the vehicle may still be drivable, this code can lead to misfires and poor performance, which could cause further engine damage over time. It’s best to address the issue promptly.
7. How much does it cost to fix code P124C on a GMC Sierra?
Repair costs can vary, ranging from $100 to $500 or more, depending on whether the issue is with wiring, the injector, or the ECM.
8. Can I fix code P124C myself?
If you’re comfortable working with automotive wiring and have the proper tools, you can inspect and repair damaged wires or connectors. Injector replacement may require advanced skills and tools.
9. Does clearing the P124C code solve the problem?
Clearing the code will reset the check engine light temporarily, but the issue will persist unless the root cause is repaired.
10. What tools are needed to troubleshoot code P124C?
You’ll need an OBDII scanner, a multimeter for electrical testing, and possibly wiring diagrams for the injector circuit.
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