P1249 2018 GMC Sierra Code - Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit
Quick Answer
The P1249 code on a 2018 GMC Sierra indicates that there is a problem with the Injector 2 Positive Voltage Control Circuit being shorted to the Control Circuit. Common causes include Wiring harness damage, Corrosion in the electrical connections, Faulty injector. 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 Wiring harness damage, Corrosion in the electrical connections, Faulty injector.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P1249 2018 GMC Sierra Description
The P1249 code on a 2018 GMC Sierra indicates that there is a problem with the Injector 2 Positive Voltage Control Circuit being shorted to the Control Circuit. In simpler terms, this means that there is an issue with the electrical circuit that controls the injector for cylinder 2 in the engine. The injector is responsible for delivering fuel into the combustion chamber at the precise moment it is needed for optimal engine performance. When this circuit is shorted, it can lead to a variety of issues that can affect the vehicle's performance and efficiency.
Common Causes of P1249 2018 GMC Sierra
- Wiring harness damage
- Corrosion in the electrical connections
- Faulty injector
- Issues with the Engine Control Module (ECM)
- Short circuit in the wiring
Symptoms of P1249 2018 GMC Sierra
- Engine misfires
- Rough idling
- Reduced fuel efficiency
- Engine stalling
- Check Engine Light illuminated
How to Fix P1249 2018 GMC Sierra
- Diagnose the exact cause of the short circuit by inspecting the wiring harness, electrical connections, and injector.
- Repair or replace any damaged wiring or connectors.
- Test the injector to ensure it is functioning correctly.
- If the injector is faulty, replace it with a new one.
- Clear the diagnostic trouble codes and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P1249 2018 GMC Sierra
The cost of repairing a P1249 code on a 2018 GMC Sierra can vary depending on the exact cause of the issue and the labor rates in your area. On average, the repair for this type of issue can range from $200 to $500, including parts and labor. It's important to note that diagnostic time and labor rates can vary, so it's recommended to get quotes from local auto repair shops for a more accurate estimate. Keep in mind that rates at dealerships or in metropolitan areas may be higher, while independent shops may offer more competitive pricing.
Need more information about the P1249 2018 GMC Sierra code?
Need more information on how to fix the P1249 2018 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1249 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
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
Code P1249 2018 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.