P124D 2016 GMC Sierra Code - Injector 6 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 6, Fuel Injector 6 harness is open or shorted, Fuel Injector 6 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
- P124D 2016 GMC Sierra indicates Injector 6 Positive Voltage Control Circuit Shorted to Control Circuit.
- Common causes
- Common causes include Faulty Fuel Injector 6, Fuel Injector 6 harness is open or shorted, Fuel Injector 6 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 P124D 2016 GMC Sierra Description
What are the Possible Causes of the DTC P124D 2016 GMC Sierra?
- Faulty Fuel Injector 6
- Fuel Injector 6 harness is open or shorted
- Fuel Injector 6 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P124D 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 P124D 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.
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Frequently Asked Questions about P124D 2016 GMC Sierra Code
1. What does the OBDII code P124D mean on a 2016 GMC Sierra?
P124D indicates that the Injector 6 Positive Voltage Control Circuit has a short to the control circuit, which disrupts proper fuel injector operation.
2. What are the common symptoms of P124D on a 2016 GMC Sierra?
Symptoms may include rough idling, reduced engine performance, misfires, poor fuel efficiency, and an illuminated check engine light.
3. What causes the P124D code to appear?
Common causes include damaged wiring in the injector circuit, a faulty fuel injector for cylinder 6, a defective engine control module (ECM), or poor electrical connections.
4. How do I diagnose the P124D code on my GMC Sierra?
Diagnosis involves inspecting the wiring and connectors for cylinder 6, testing the injector for continuity, and using a multimeter to check for shorts or voltage irregularities in the circuit.
5. Can I continue driving with a P124D code?
Driving with this code is not recommended as it can lead to engine damage, poor performance, and increased emissions over time.
6. How is the P124D code fixed?
Repairs may include replacing damaged wiring or connectors, replacing the injector for cylinder 6, or reprogramming or replacing the ECM if necessary.
7. How much does it cost to fix the P124D code on a 2016 GMC Sierra?
Repair costs vary but typically range from $100 to $300 for wiring repairs or injector replacement. ECM replacement is more expensive, often exceeding $500.
8. Can a dirty injector cause the P124D code?
No, this code specifically relates to an electrical issue, not a mechanical or clogging problem with the injector.
9. Do I need special tools to fix the P124D code?
Yes, you may need an OBDII scanner, a multimeter for electrical testing, and possibly manufacturer-specific diagnostic tools.
10. Could a blown fuse cause the P124D code?
While unlikely, a blown fuse in the injector circuit could contribute to electrical issues and should be checked during diagnosis.
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