AutoCodes – Chevrolet – P1249 2018 Chevrolet Silverado

P1249 2018 Chevrolet Silverado 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 Chevrolet Silverado 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 524

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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado - Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit - AutoCodes.com — P1249 2018 Chevrolet Silverado Code - Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit

What does this mean?

What are the Possible Causes of the DTC P1249 2018 Chevrolet Silverado?

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 Chevrolet Silverado?

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 Chevrolet Silverado 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 Chevrolet Silverado code?

Need more information on how to fix the P1249 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1249 2018 Chevrolet Silverado 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 P1249 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P1249 on a 2018 Chevrolet Silverado?

- Common symptoms of code P1249 include engine misfires, rough idling, loss of power, and poor fuel efficiency.

2. What does OBDII code P1249 on a 2018 Chevrolet Silverado mean?

- OBDII code P1249 indicates that there is a short circuit between the positive voltage control circuit and the control circuit of Injector 2 in the vehicle's fuel injection system.

3. What are the possible causes of OBDII code P1249 on a 2018 Chevrolet Silverado?

- Possible causes of code P1249 include a faulty fuel injector, damaged wiring or connectors, a short circuit in the injector circuit, or a problem with the Engine Control Module (ECM).

4. How can I diagnose OBDII code P1249 on my 2018 Chevrolet Silverado?

- Diagnosing code P1249 usually involves visually inspecting the wiring and connectors related to Injector 2, testing the injector for proper operation, and using a scan tool to check the ECM for any stored fault codes.

5. Can I still drive my 2018 Chevrolet Silverado with OBDII code P1249?

- It is not recommended to drive your vehicle with code P1249 present, as it can lead to further damage to the engine and catalytic converter. It is best to address the issue promptly.

6. How can I repair OBDII code P1249 on my 2018 Chevrolet Silverado?

- Repairing code P1249 may involve replacing the faulty fuel injector, repairing any damaged wiring or connectors, clearing the fault codes, and performing a test drive to ensure the issue is resolved.

7. Is it possible to reset OBDII code P1249 on a 2018 Chevrolet Silverado without fixing the underlying issue?

- While you can clear the fault code using a scan tool, it is important to address the root cause of the problem to prevent the code from reoccurring.

8. Are there any preventive maintenance tips to avoid OBDII code P1249 on a 2018 Chevrolet Silverado?

- To prevent code P1249, it is recommended to follow the manufacturer's maintenance schedule, use high-quality fuel, and regularly inspect the fuel injection system for any signs of wear or damage.

9. Can a DIY enthusiast fix OBDII code P1249 on a 2018 Chevrolet Silverado?

- Depending on your skill level and access to tools, DIY enthusiasts may be able to diagnose and repair code P1249. However, if you are unsure, it is best to seek professional help to avoid further complications.

10. How long does it typically take to repair OBDII code P1249 on a 2018 Chevrolet Silverado?

- The repair time for code P1249 can vary depending on the exact cause of the issue and the availability of parts. In general, it may take a few hours to a full day to diagnose and repair the problem.