AutoCodes – GMC – P1248 2014 GMC Sierra

P1248 2014 GMC Sierra Code - Injector 1 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 1, Fuel Injector 1 harness is open or shorted, Fuel Injector 1 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: P1248 2014 GMC Sierra indicates Injector 1 Positive Voltage Control Circuit Shorted to Control Circuit.
Common causes: Common causes include Faulty Fuel Injector 1, Fuel Injector 1 harness is open or shorted, Fuel Injector 1 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 300

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 P1248 2014 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 P1248 2014 GMC Sierra - Injector 1 Positive Voltage Control Circuit Shorted to Control Circuit - AutoCodes.com — P1248 2014 GMC Sierra Code - Injector 1 Positive Voltage Control Circuit Shorted to Control Circuit

What does this mean?

What are the Possible Causes of the DTC P1248 2014 GMC Sierra?

Faulty Fuel Injector 1
Fuel Injector 1 harness is open or shorted
Fuel Injector 1 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P1248 2014 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 P1248 2014 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 P1248 2014 GMC Sierra code?

Need more information on how to fix the P1248 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1248 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 P1248 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code P1248 in a 2014 GMC Sierra?

The common symptoms of OBDII code P1248 in a 2014 GMC Sierra include rough idling, engine misfires, decreased fuel efficiency, and potentially a check engine light.

2. What does the OBDII code P1248 "Injector 1 Positive Voltage Control Circuit Shorted to Control Circuit" mean for a 2014 GMC Sierra?

The code P1248 indicates an issue with the positive voltage control circuit for injector 1 in a 2014 GMC Sierra, specifically a short to the control circuit.

3. What are the possible causes of OBDII code P1248 in a 2014 GMC Sierra?

Possible causes of OBDII code P1248 in a 2014 GMC Sierra include damaged wiring, a faulty injector, a defective PCM (Powertrain Control Module), or a poor electrical connection.

4. Can I continue driving my 2014 GMC Sierra with OBDII code P1248?

It is not recommended to continue driving your 2014 GMC Sierra with OBDII code P1248, as it can lead to further engine damage and potentially unsafe driving conditions.

5. How can I diagnose and repair OBDII code P1248 on my 2014 GMC Sierra?

Diagnosing and repairing OBDII code P1248 on a 2014 GMC Sierra typically involves checking the wiring harness and connections for damage, testing the injector, and inspecting the PCM for faults. Professional diagnostic tools may be needed for a more accurate assessment.

6. Is it safe to reset the OBDII code P1248 in a 2014 GMC Sierra using a scanner?

While resetting the OBDII code P1248 using a scanner may temporarily turn off the check engine light, it is important to address the underlying issue causing the code to prevent further problems and potential engine damage.

7. How much does it cost to repair OBDII code P1248 in a 2014 GMC Sierra?

The cost to repair OBDII code P1248 in a 2014 GMC Sierra can vary depending on the specific cause of the issue, the extent of the damage, and whether professional assistance is required. Costs may include parts and labor.

8. Are there any preventive measures to avoid OBDII code P1248 in a 2014 GMC Sierra?

To prevent OBDII code P1248 in a 2014 GMC Sierra, it is important to perform regular maintenance checks, address any warning signs promptly, and ensure the electrical system is in good condition.

9. Can a DIY enthusiast with basic automotive knowledge fix OBDII code P1248 in a 2014 GMC Sierra?

While some DIY enthusiasts with basic automotive knowledge may be able to diagnose and address simple causes of OBDII code P1248, complex issues or intricate repairs may require professional assistance.

10. Will OBDII code P1248 affect the performance of my 2014 GMC Sierra?

Yes, OBDII code P1248 can affect the performance of your 2014 GMC Sierra by causing engine misfires, rough idling, decreased fuel efficiency, and potentially leading to more severe issues if left unaddressed.