P1249 2018 GMC Sierra Code - Injector 2 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 2, Fuel Injector 2 harness is open or shorted, Fuel Injector 2 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
- P1249 2018 GMC Sierra indicates Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit.
- Common causes
- Common causes include Faulty Fuel Injector 2, Fuel Injector 2 harness is open or shorted, Fuel Injector 2 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 P1249 2018 GMC Sierra Description
What are the Possible Causes of the DTC P1249 2018 GMC Sierra?
- Faulty Fuel Injector 2
- Fuel Injector 2 harness is open or shorted
- Fuel Injector 2 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P1249 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 P1249 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.
Need more information about the P1249 2018 GMC Sierra code?
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Frequently Asked Questions about P1249 2018 GMC Sierra Code
What does the OBD-II code P1249 mean on a 2018 GMC Sierra?
P1249 indicates that the positive voltage control circuit for injector 2 is shorted to the control circuit, disrupting proper fuel injection.
What are the common symptoms of P1249 on a 2018 GMC Sierra?
Symptoms may include engine misfires, rough idling, reduced fuel efficiency, difficulty starting, and possible illumination of the check engine light.
What causes the P1249 code on a 2018 GMC Sierra?
Common causes include damaged wiring, a short circuit, a faulty injector, or issues with the powertrain control module (PCM).
Can I drive my 2018 GMC Sierra with the P1249 code?
Driving with this code is not recommended, as it can lead to performance issues, increased emissions, and potential engine damage.
How do I diagnose the P1249 code on a 2018 GMC Sierra?
Start by inspecting the wiring and connectors for injector 2, checking for shorts or damage. If no issues are found, test the injector and PCM.
What tools are needed to fix the P1249 code on a 2018 GMC Sierra?
You’ll need an OBD-II scanner, a multimeter for electrical testing, and possibly replacement parts such as wiring or the injector itself.
How much does it cost to repair the P1249 code on a 2018 GMC Sierra?
Repair costs vary, but fixing wiring or connectors can cost $100–$200, while replacing an injector may cost $300–$800.
Can a faulty PCM cause the P1249 code on my 2018 GMC Sierra?
Yes, a malfunctioning powertrain control module can contribute to this code, though it is less common compared to wiring or injector issues.
How can I prevent the P1249 code on a 2018 GMC Sierra?
Regular maintenance, such as inspecting wiring and connectors for damage, can help prevent injector-related issues.
Should I clear the P1249 code after repairs on a 2018 GMC Sierra?
Yes, after completing repairs, clear the code with an OBD-II scanner and test drive the vehicle to ensure the issue is resolved.
Discuss the causes and fixes for P1249 2018 GMC Sierra OBDII Code
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