P124B GMC Code - Injector 4 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 4, Fuel Injector 4 harness is open or shorted, Fuel Injector 4 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
- P124B GMC indicates Injector 4 Positive Voltage Control Circuit Shorted to Control Circuit.
- Common causes
- Common causes include Faulty Fuel Injector 4, Fuel Injector 4 harness is open or shorted, Fuel Injector 4 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 P124B GMC Description
What are the Possible Causes of the DTC P124B GMC?
- Faulty Fuel Injector 4
- Fuel Injector 4 harness is open or shorted
- Fuel Injector 4 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P124B 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 P124B 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
- P124B 2014 GMC Sierra — Injector 4 Positive Voltage Control Circuit Shorted to Control Circuit
- P124B 2015 GMC Sierra — Injector 4 Positive Voltage Control Circuit Shorted to Control Circuit
- P124B 2016 GMC Sierra — Injector 4 Positive Voltage Control Circuit Shorted to Control Circuit
- P124B 2017 GMC Sierra — Injector 4 Positive Voltage Control Circuit Shorted to Control Circuit
- P124B 2018 GMC Sierra — Injector 4 Positive Voltage Control Circuit Shorted to Control Circuit
Frequently Asked Questions about P124B GMC Code
1. What are the common symptoms of OBDII code P124B GMC?
- Common symptoms include rough engine performance, poor fuel efficiency, engine misfires, and the illumination of the Check Engine Light.
2. What could cause the Injector 4 Positive Voltage Control Circuit to short to the Control Circuit?
- The shorting of the Injector 4 Positive Voltage Control Circuit to the Control Circuit could be caused by damaged wiring, a faulty injector, or a problem with the Engine Control Module (ECM).
3. How can I diagnose the issue related to code P124B GMC?
- Diagnosing the issue may involve conducting a visual inspection of the wiring harness, testing the injector for proper function, and using a scan tool to analyze data from the ECM.
4. What are the potential dangers of driving with OBDII code P124B?
- Driving with this code may lead to further damage to the fuel injector or other engine components, reduced engine performance, and potential engine stalling.
5. Can I repair the Injector 4 Positive Voltage Control Circuit shorted to Control Circuit issue myself?
- While some DIY enthusiasts may be able to address this issue by replacing damaged wiring or a faulty injector, it is recommended to seek professional help for an accurate diagnosis and repair.
6. How much does it typically cost to repair OBDII code P124B GMC at a dealership or auto repair shop?
- Repair costs can vary depending on the extent of the damage and the specific repairs needed, but expect to pay anywhere from $100 to $500 for parts and labor.
7. Are there any preventative maintenance steps I can take to avoid encountering code P124B in the future?
- Regularly inspecting the engine wiring harness for signs of wear, maintaining a clean fuel system, and using high-quality fuel can help prevent issues that may trigger this code.
8. Will resetting the Check Engine Light make OBDII code P124B disappear permanently?
- Simply resetting the Check Engine Light will not permanently resolve the underlying issue causing code P124B; it is important to address the root cause of the problem to prevent the code from reoccurring.
9. Can a faulty fuel injector cause other OBDII codes to appear along with P124B?
- Yes, a faulty fuel injector can lead to various engine performance issues that may trigger additional OBDII codes related to misfires, fuel system malfunctions, or injector circuit problems.
10. Is it safe to continue driving my vehicle if I suspect OBDII code P124B GMC is present?
- It is not recommended to continue driving the vehicle if you suspect this code is present, as it can lead to potential engine damage and safety hazards. It is best to have the issue diagnosed and repaired promptly.
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