P124C GMC 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 GMC 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 GMC Description
What are the Possible Causes of the DTC P124C GMC?
- 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 GMC?
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 GMC 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.
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Information for Specific GMC Models
- P124C 2014 GMC Sierra — Injector 5 Positive Voltage Control Circuit Shorted to Control Circuit
- P124C 2015 GMC Sierra — Injector 5 Positive Voltage Control Circuit Shorted to Control Circuit
- P124C 2016 GMC Sierra — Injector 5 Positive Voltage Control Circuit Shorted to Control Circuit
- P124C 2017 GMC Sierra — Injector 5 Positive Voltage Control Circuit Shorted to Control Circuit
- P124C 2018 GMC Sierra — Injector 5 Positive Voltage Control Circuit Shorted to Control Circuit
Frequently Asked Questions about P124C GMC Code
1. What are the common symptoms of OBDII code P124C for GMC?
The common symptoms of code P124C may include engine misfires, rough idling, poor acceleration, and the illumination of the Check Engine Light.
2. What usually causes OBDII code P124C in GMC vehicles?
Code P124C is typically triggered when the positive voltage control circuit for Injector 5 is shorted to the control circuit. This can be caused by damaged wiring, a faulty injector, or a problem with the powertrain control module (PCM).
3. How can I diagnose the root cause of OBDII code P124C in my GMC vehicle?
Diagnosing code P124C may involve visually inspecting the wiring harness for damage, testing the injector for proper function, and using a multimeter to check for continuity and voltage at various points in the circuit.
4. Is it safe to continue driving my GMC vehicle with OBDII code P124C present?
It is not recommended to drive your vehicle with an active fault code like P124C, as it can lead to further damage to the engine or emissions system. It is best to address the issue promptly.
5. How can I repair OBDII code P124C in my GMC vehicle?
Repairing code P124C may involve repairing or replacing damaged wiring, replacing the faulty injector, or reprogramming the PCM if necessary. It is recommended to follow a step-by-step diagnostic process to pinpoint the exact cause.
6. Can a DIY enthusiast fix OBDII code P124C, or should I seek professional help?
While some DIY enthusiasts may be able to address code P124C themselves, it is recommended to have a professional mechanic with experience in diagnosing and repairing electrical issues work on this code to ensure a proper fix.
7. Are there any preventive measures to avoid OBDII code P124C in GMC vehicles?
To prevent code P124C, it is advisable to regularly inspect the wiring harness for signs of wear or damage, maintain the fuel system properly, and address any engine performance issues promptly.
8. Will resetting the OBDII system clear code P124C from my GMC vehicle?
Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing P124C is not addressed, the code is likely to reappear once the vehicle is driven and the PCM runs its diagnostic checks.
9. How long does it typically take to repair OBDII code P124C in a GMC vehicle?
The repair time for code P124C can vary depending on the exact cause of the issue and the complexity of the repair. It can range from a quick fix to a more involved repair requiring several hours.
10. Can OBDII code P124C cause any long-term damage to the engine or other components?
If left unresolved, code P124C can lead to engine performance issues, increased fuel consumption, and potential damage to the catalytic converter or other engine components over time. It is crucial to address this code promptly.
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