P1249 GMC Code - Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit
Quick Answer
The P1249 GMC code indicates that there is a short circuit in the control circuit of Injector 2's positive voltage control. Common causes include Damaged wiring harness: The wiring harness connecting the injector to the ECM may be damaged, causing a short circuit, Faulty injector: The injector itself may be faulty, leading to issues with the control circuit, Malfunctioning ECM: A malfunction in the Engine Control Module can also cause a short circuit in the injector control circuit. 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 GMC indicates Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit.
- Common causes
- Common causes include Damaged wiring harness: The wiring harness connecting the injector to the ECM may be damaged, causing a short circuit, Faulty injector: The injector itself may be faulty, leading to issues with the control circuit, Malfunctioning ECM: A malfunction in the Engine Control Module can also cause a short circuit in the injector control circuit.
- 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.
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Code P1249 GMC Description
The P1249 GMC code indicates that there is a short circuit in the control circuit of Injector 2's positive voltage control. In simpler terms, this means that there is an issue with the electrical connection that controls the injector for the second cylinder of the engine. This can lead to a disruption in the fuel delivery process, affecting the combustion cycle and overall engine performance.
Common Causes of P1249 GMC
- Damaged wiring harness: The wiring harness connecting the injector to the ECM may be damaged, causing a short circuit.
- Faulty injector: The injector itself may be faulty, leading to issues with the control circuit.
- Malfunctioning ECM: A malfunction in the Engine Control Module can also cause a short circuit in the injector control circuit.
- Poor connection at the injector: A loose or corroded connection at the injector can disrupt the voltage control circuit.
Symptoms of P1249 GMC
- Misfires: The engine may experience misfires, causing it to run rough and potentially leading to a loss of power.
- Rough idling: The vehicle may idle roughly or inconsistently, indicating a problem with the fuel delivery system.
- Decreased fuel efficiency: A short circuit in the injector control circuit can lead to inefficient fuel delivery, resulting in decreased fuel efficiency.
- Engine stalling: In severe cases, the engine may stall unexpectedly, especially at idle or low speeds.
How to Fix P1249 GMC
- Diagnose the issue: Use a diagnostic tool to pinpoint the exact cause of the short circuit in the injector control circuit.
- Inspect wiring harness: Check the wiring harness for any damage or loose connections. Repair or replace as necessary.
- Test injector: Test the injector to ensure it is functioning properly. Replace if faulty.
- Check ECM: Inspect the Engine Control Module for any malfunctions. Repair or replace if needed.
- Clear the code: Once the repairs have been made, clear the diagnostic trouble code from the ECM to reset the system.
Cost to Fix P1249 GMC
The cost of repairing a P1249 GMC code can vary depending on the exact cause of the issue and the labor rates at the auto repair shop. On average, the repair costs for this issue can range from $200 to $500, including parts and labor. It is important to note that the specific diagnosis time and labor rates can vary based on factors such as location, vehicle make and model, and engine type. It is advisable to check with local auto repair shops for a more accurate estimate.
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Information for Specific GMC Models
- P1249 2014 GMC Sierra — Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit
- P1249 2015 GMC Sierra — Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit
- P1249 2016 GMC Sierra — Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit
- P1249 2017 GMC Sierra — Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit
- P1249 2018 GMC Sierra — Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit
Frequently Asked Questions about P1249 GMC Code
1. What are the common symptoms of OBDII code P1249 on a GMC vehicle?
- Common symptoms include engine misfires, rough idling, decreased fuel efficiency, and potential stalling.
2. What causes the OBDII code P1249 on a GMC vehicle?
- The code is typically triggered by a short circuit between the control circuit and the positive voltage circuit of injector 2 in the fuel injection system.
3. How can I diagnose the Injector 2 Positive Voltage Control Circuit issue in my GMC vehicle?
- It is recommended to use a diagnostic scanner to read the OBDII codes, perform a visual inspection of the wiring harness, and test the injector 2 circuit for continuity and shorts.
4. Can a faulty injector itself cause the OBDII code P1249 on a GMC vehicle?
- Yes, a malfunctioning injector can cause the short circuit between the control circuit and positive voltage circuit, leading to the P1249 code.
5. How should I repair the Injector 2 Positive Voltage Control Circuit shorted to control circuit issue on my GMC?
- Repair involves identifying and repairing the short circuit in the wiring harness, replacing the damaged injector, and clearing the error codes with a diagnostic scanner.
6. Are there any safety precautions to consider when working on the Injector 2 Positive Voltage Control Circuit issue?
- It is important to disconnect the vehicle's battery before performing any electrical work to avoid potential hazards and damage to the vehicle's electrical system.
7. Can driving with the OBDII code P1249 on a GMC vehicle cause further damage?
- Continuing to drive with this issue can potentially lead to more serious problems such as engine damage or further electrical system issues, so it is best to address it promptly.
8. How much does it typically cost to repair the Injector 2 Positive Voltage Control Circuit issue on a GMC vehicle?
- The cost of repair can vary depending on the extent of the damage, but it may range from $200 to $500 for parts and labor at a repair shop.
9. Is it possible to reset the OBDII code P1249 on a GMC vehicle without fixing the underlying issue?
- While it is possible to clear the error code temporarily, it will likely reappear until the root cause of the problem is addressed and repaired.
10. Can a DIY enthusiast with basic automotive knowledge repair the Injector 2 Positive Voltage Control Circuit issue in a GMC vehicle?
- Depending on your skill level, you may be able to replace the injector or repair the wiring yourself, but it is recommended to consult a professional mechanic for accurate diagnosis and repair.
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