AutoCodes – Buick – P1249 Buick

P1249 Buick 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 Buick 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 416

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 Mar 23, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1249 Buick 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 Buick - Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit - AutoCodes.com — P1249 Buick Code - Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit

What does this mean?

What are the Possible Causes of the DTC P1249 Buick?

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 Buick?

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 Buick 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.

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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 Buick Code

1. What does the OBDII code P1249 mean on a Buick?

It indicates that the Injector 2 Positive Voltage Control Circuit is shorted to the control circuit, disrupting proper fuel injector operation.

2. What are the common symptoms of code P1249 in a Buick?

Symptoms may include rough idling, engine misfires, reduced performance, poor fuel economy, or difficulty starting the engine.

3. What causes the P1249 code to appear?

Common causes include damaged or shorted wiring, a faulty fuel injector, a malfunctioning Engine Control Module (ECM), or corroded electrical connections.

4. Can I drive my Buick with the P1249 code active?

Driving with this code is not recommended as it can lead to further engine damage or unsafe driving conditions due to misfires and poor performance.

5. How do I diagnose the P1249 code in my Buick?

Start by inspecting the wiring and connectors for Injector 2, check for shorts or damage, and test the injector and ECM for proper functionality.

6. What tools are needed to troubleshoot the P1249 code?

You may need an OBDII scanner, a multimeter, and possibly a wiring diagram for the specific Buick model to trace the fault.

7. How do I fix the P1249 code on a Buick?

Repairs may involve replacing damaged wiring, repairing electrical connections, replacing the faulty injector, or, in rare cases, reprogramming or replacing the ECM.

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

Costs can vary depending on the issue, but injector replacement might cost $200-$400, while wiring repairs could cost less. ECM replacement may be more expensive.

9. Can a dirty fuel injector cause the P1249 code?

A dirty injector is unlikely to cause this code, as it specifically relates to an electrical short in the circuit.

10. How can I prevent the P1249 code from recurring?

Regularly inspect and maintain your vehicleâ€™s wiring and electrical connections, avoid overloading the electrical system, and use quality replacement parts when repairs are needed.