P124A GMC Code - Injector 3 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 3, Fuel Injector 3 harness is open or shorted, Fuel Injector 3 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
- P124A GMC indicates Injector 3 Positive Voltage Control Circuit Shorted to Control Circuit.
- Common causes
- Common causes include Faulty Fuel Injector 3, Fuel Injector 3 harness is open or shorted, Fuel Injector 3 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 P124A GMC Description
What are the Possible Causes of the DTC P124A GMC?
- Faulty Fuel Injector 3
- Fuel Injector 3 harness is open or shorted
- Fuel Injector 3 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P124A 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 P124A 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
- P124A 2014 GMC Sierra — Injector 3 Positive Voltage Control Circuit Shorted to Control Circuit
- P124A 2015 GMC Sierra — Injector 3 Positive Voltage Control Circuit Shorted to Control Circuit
- P124A 2016 GMC Sierra — Injector 3 Positive Voltage Control Circuit Shorted to Control Circuit
- P124A 2017 GMC Sierra — Injector 3 Positive Voltage Control Circuit Shorted to Control Circuit
- P124A 2018 GMC Sierra — Injector 3 Positive Voltage Control Circuit Shorted to Control Circuit
Frequently Asked Questions about P124A GMC Code
1. What are the common symptoms of OBDII code P124A in a GMC related to Injector 3?
The common symptoms include rough idling, engine misfires, decreased fuel efficiency, and illuminated Check Engine Light.
2. What causes the Injector 3 Positive Voltage Control Circuit to short to the control circuit in a GMC?
The primary causes of this issue are damaged wiring or connectors, a faulty fuel injector, a defective Engine Control Module (ECM), or corrosion in the electrical system.
3. How can I diagnose the Injector 3 Positive Voltage Control Circuit shorting issue in my GMC?
Diagnosing this problem involves performing a visual inspection of the wiring and connectors, testing the fuel injector for proper function, checking for corrosion, and using a multimeter to measure voltage in the circuit.
4. Is it safe to continue driving my GMC with OBDII code P124A related to Injector 3?
It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the engine and emissions system.
5. Can I repair the Injector 3 Positive Voltage Control Circuit shorting issue in my GMC myself?
While some DIY enthusiasts may attempt to repair this issue, it is recommended to seek professional help to ensure proper diagnosis and repair of the underlying cause.
6. How much does it typically cost to repair OBDII code P124A in a GMC related to Injector 3?
The cost of repairing this code can vary depending on the specific cause of the issue, but it may range from $100 to $500 or more, including parts and labor.
7. Will resetting the Check Engine Light clear the OBDII code P124A in a GMC?
Resetting the Check Engine Light may temporarily clear the code, but it will likely reappear if the underlying issue causing the Injector 3 Positive Voltage Control Circuit shorting is not addressed.
8. How long does it take to repair the Injector 3 Positive Voltage Control Circuit shorting issue in a GMC?
The repair time can vary based on the severity of the problem and the availability of parts, but it typically takes a few hours to a full day to diagnose and fix the issue.
9. Are there any preventive measures I can take to avoid OBDII code P124A related to Injector 3 in my GMC?
Regular maintenance, such as checking and cleaning connectors, inspecting wiring for damage, and using high-quality fuel, can help prevent issues that may lead to this code.
10. Can a faulty fuel injector cause OBDII code P124A in a GMC, even if Injector 3 is not the one affected?
Yes, a faulty fuel injector in another cylinder can sometimes cause issues within the control circuit, leading to a similar OBDII code even if Injector 3 is not directly involved.
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