P124E 2018 GMC Sierra Code - Cylinder 7 Injector High 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 7, Fuel Injector 7 harness is open or shorted, Fuel Injector 7 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
- P124E 2018 GMC Sierra indicates Cylinder 7 Injector High Control Circuit Shorted to Control Circuit.
- Common causes
- Common causes include Faulty Fuel Injector 7, Fuel Injector 7 harness is open or shorted, Fuel Injector 7 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 P124E 2018 GMC Sierra Description
What are the Possible Causes of the DTC P124E 2018 GMC Sierra?
- Faulty Fuel Injector 7
- Fuel Injector 7 harness is open or shorted
- Fuel Injector 7 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P124E 2018 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 P124E 2018 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 P124E 2018 GMC Sierra Code
1. What does OBDII code P124E mean for a 2018 GMC Sierra?
P124E indicates that the Cylinder 7 Injector High Control Circuit has a short to control circuit, meaning there's an electrical issue affecting the injector's performance.
2. What are the common symptoms of code P124E?
Symptoms may include rough idling, misfiring, reduced engine performance, poor fuel economy, and the check engine light illuminating.
3. What causes code P124E to appear?
Common causes include damaged or frayed wiring, a faulty injector, a shorted control circuit, or a malfunctioning engine control module (ECM).
4. Can I drive my 2018 GMC Sierra with code P124E?
Driving with this code is not recommended, as it can lead to further engine damage, reduced performance, and unsafe driving conditions.
5. How do I diagnose P124E in my GMC Sierra?
Diagnosis involves visually inspecting the wiring and connectors for damage, testing the cylinder 7 fuel injector, and using a multimeter to check the circuit for shorts or continuity issues.
6. What tools are needed to fix P124E?
You may need an OBDII scanner, a multimeter, wiring repair tools, and a replacement fuel injector if it's faulty.
7. How much does it cost to repair code P124E?
Repair costs can vary, but replacing an injector typically costs $300-$500, while wiring repairs or ECM replacements may be more expensive.
8. Can a faulty ECM cause code P124E?
Yes, a malfunctioning ECM may fail to properly control the injector circuit, leading to this code.
9. What should I check first when troubleshooting P124E?
Start by inspecting the wiring and connectors around the cylinder 7 fuel injector for damage or corrosion.
10. Will clearing the code fix the problem?
No, clearing the code without addressing the root cause will likely result in the code returning and continued performance issues.
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