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P1249 Buick Code - Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit

Quick Answer

The P1249 Buick code indicates that there is a short circuit between the positive voltage control circuit of injector 2 and the control circuit. Common causes include Wiring harness damage or wear, Corrosion in the electrical connectors, Faulty fuel injector. 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 Wiring harness damage or wear, Corrosion in the electrical connectors, Faulty fuel injector.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P1249 Buick Description

The P1249 Buick code indicates that there is a short circuit between the positive voltage control circuit of injector 2 and the control circuit. In simpler terms, this means that there is an issue with the electrical connection that controls the fuel injector for cylinder 2 in the engine. Fuel injectors are responsible for delivering the precise amount of fuel into the combustion chamber for efficient engine operation. When there is a short circuit in the control circuit, it can disrupt the injector's function and lead to a variety of performance issues.

OBDII Code P1249 Buick - Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit
P1249 Buick Code - Injector 2 Positive Voltage Control Circuit Shorted to Control Circuit

Common Causes of P1249 Buick

  1. Wiring harness damage or wear
  2. Corrosion in the electrical connectors
  3. Faulty fuel injector
  4. Issues with the Engine Control Module (ECM)
  5. Short circuit in the positive voltage control circuit

Symptoms of P1249 Buick

  1. Engine misfires
  2. Rough idle
  3. Hesitation or stumbling during acceleration
  4. Decreased fuel efficiency
  5. Illuminated check engine light

How to Fix P1249 Buick

  1. Diagnose the specific cause of the short circuit using a multimeter and wiring diagrams.
  2. Inspect the wiring harness for any damage or wear and repair or replace as needed.
  3. Check the electrical connectors for corrosion or poor connections and clean or replace them.
  4. Test the fuel injector for proper function and replace if necessary.
  5. Clear the fault code from the ECM and test drive the vehicle to ensure proper operation.

Cost to Fix P1249 Buick

The typical repair costs for addressing a P1249 Buick code can range from $150 to $500, depending on the specific cause of the issue and the cost of replacement parts. Additional costs may include diagnostic time and labor rates, which can vary between auto repair shops. It is advisable to consult with a professional mechanic for a more accurate estimate based on your vehicle's make and model.

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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 vehicle’s wiring and electrical connections, avoid overloading the electrical system, and use quality replacement parts when repairs are needed.

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