AutoCodes – GMC – P1249 2015 GMC Sierra

P1249 2015 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 2015 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.

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Code Popularity 308

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Aug 12, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1249 2015 GMC Sierra Description

The Engine Control Module (ECM) supplies voltage to each fuel injector on the injector high voltage supply circuits. The ECM energizes each fuel injector by grounding the high voltage control circuit of the fuel injector. The ECM monitors the status of the injector high voltage supply circuits and the fuel injector high voltage control circuits. When a fuel injector circuit condition is detected by the ECM, the affected fuel injector(s) is disabled. The Diagnostic Trouble Code (DTC) will be set if the ECM detects the injector high control circuit is shorted to the low control circuit for greater than 2 s.

OBDII Code P1249 2015 GMC Sierra - Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit - AutoCodes.com — P1249 2015 GMC Sierra Code - Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit

What does this mean?

What are the Possible Causes of the DTC P1249 2015 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 2015 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 2015 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 2015 GMC Sierra code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1249 2015 GMC Sierra Code

1. What does the OBDII code P1249 mean for a 2015 GMC Sierra?

P1249 indicates that the Injector 2 Positive Voltage Control Circuit is shorted to the control circuit, meaning there is an electrical issue affecting the fuel injector's operation for cylinder 2.

2. What are the common symptoms of code P1249 in a 2015 GMC Sierra?

Common symptoms include poor engine performance, rough idling, misfires, reduced fuel efficiency, and possibly a check engine light.

3. What causes the P1249 code in a 2015 GMC Sierra?

The code can be caused by damaged wiring, a short circuit, a faulty injector, a corroded connector, or a malfunctioning engine control module (ECM).

4. Can I drive my 2015 GMC Sierra with the P1249 code?

Itâ€™s not recommended to drive with this code, as it could lead to further engine damage or unsafe driving conditions due to misfires or reduced power.

5. How do I diagnose the P1249 code on my 2015 GMC Sierra?

Start by inspecting the wiring and connectors for cylinder 2â€™s injector, checking for shorts, corrosion, or damage. Then test the injector and circuit with a multimeter or consult a mechanic.

6. How much does it cost to fix the P1249 code?

Repair costs can vary, ranging from $50 for minor wiring repairs to $300 or more if the injector or ECM needs replacement.

7. Can a bad fuel injector cause the P1249 code?

Yes, a faulty fuel injector for cylinder 2 can trigger the P1249 code if it is not functioning properly or if it is causing a short in the circuit.

8. How do I reset the P1249 code on my 2015 GMC Sierra?

After fixing the issue, you can reset the code by using an OBDII scanner to clear it, or the ECM will clear it automatically after several drive cycles if the problem is resolved.

9. Could the P1249 code indicate a problem with the ECM?

Yes, if the wiring and injector are in good condition, the ECM might be malfunctioning and failing to properly control the injector circuit.

10. Are there any related codes that might appear with P1249?

Yes, related codes such as P0202 (Injector Circuit Malfunction for Cylinder 2) or other injector-related codes may appear, indicating additional issues in the system.