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P2306 2014 GMC Sierra Code - Ignition Coil 3 Control Circuit Low Voltage

Quick Answer

The P2306 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a problem with the ignition coil 3 control circuit experiencing low voltage. Common causes include Faulty ignition coil, Damaged wiring or connectors in the control circuit, Issues with the engine control module (ECM). 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
P2306 2014 GMC Sierra indicates Ignition Coil 3 Control Circuit Low Voltage.
Common causes
Common causes include Faulty ignition coil, Damaged wiring or connectors in the control circuit, Issues with the engine control module (ECM).
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 14, 2024
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Code P2306 2014 GMC Sierra Description

The P2306 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a problem with the ignition coil 3 control circuit experiencing low voltage. The ignition coil is a crucial component in the vehicle's ignition system, responsible for converting the low voltage from the battery into the high voltage needed to create a spark in the spark plugs. Ignition coil 3 specifically refers to the coil associated with the third cylinder in the engine.

OBDII Code P2306 2014 GMC Sierra - Ignition Coil 3 Control Circuit Low Voltage
P2306 2014 GMC Sierra Code - Ignition Coil 3 Control Circuit Low Voltage

Common Causes of P2306 2014 GMC Sierra

  1. Faulty ignition coil
  2. Damaged wiring or connectors in the control circuit
  3. Issues with the engine control module (ECM)
  4. Corrosion or poor connections in the electrical system
  5. Environmental factors such as moisture or heat affecting the ignition system

Symptoms of P2306 2014 GMC Sierra

  1. Difficulty starting the vehicle
  2. Decreased fuel efficiency
  3. Hesitation or stumbling during acceleration
  4. Rough idling
  5. Stalling

How to Fix P2306 2014 GMC Sierra

  1. Begin by diagnosing the specific cause of the low voltage in the ignition coil 3 control circuit using a diagnostic scanner.
  2. Inspect the ignition coil, wiring, and connectors for any visible damage or corrosion. Replace any faulty components.
  3. Test the continuity of the wiring and connectors to ensure proper electrical flow.
  4. Clear the DTC from the vehicle's ECM using the diagnostic scanner and test the vehicle to ensure the issue has been resolved.
  5. If the problem persists, consider seeking professional help from a certified mechanic to further diagnose and repair the issue.

Cost to Fix P2306 2014 GMC Sierra

The typical repair costs for addressing a P2306 code in a 2014 GMC Sierra can vary depending on the specific cause of the issue. On average, the cost of replacing an ignition coil can range from $100 to $300, while addressing wiring or connector issues may add to the total cost. Labor rates at auto repair shops can range from $80 to $150 per hour, so the total repair cost can vary based on the time required for diagnosis and repair. It is advisable to check with local auto repair shops for a more accurate estimate based on your location and vehicle specifics.

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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 P2306 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code P2306 in a 2014 GMC Sierra related to Ignition Coil 3 Control Circuit Low Voltage?

The common symptoms include engine misfires, rough idling, lack of power, and potentially poor fuel economy.

2. What can cause the Ignition Coil 3 Control Circuit Low Voltage issue in a 2014 GMC Sierra?

Possible causes of this issue can include a faulty ignition coil, damaged wiring or connectors, a defective PCM (Powertrain Control Module), or a problem with the ignition coil driver circuit.

3. How serious is the P2306 OBDII code related to Ignition Coil 3 Control Circuit Low Voltage in a 2014 GMC Sierra?

While the vehicle may still be able to operate with this code present, it can lead to poor engine performance, reduced fuel efficiency, and potential long-term damage to the engine if left unresolved.

4. Can driving with OBDII code P2306 in a 2014 GMC Sierra cause further damage?

Continuing to drive with this code may cause damage to the catalytic converter due to unburned fuel entering the exhaust system, potentially resulting in more expensive repairs down the line.

5. How can I diagnose and repair the Ignition Coil 3 Control Circuit Low Voltage issue in my 2014 GMC Sierra?

Diagnosing the issue involves inspecting the ignition coil, wiring, connectors, and related components for any visible damage. Repair typically involves replacing the faulty ignition coil, repairing damaged wiring, or addressing any issues with the PCM.

6. Is it safe to continue driving my 2014 GMC Sierra with OBDII code P2306?

It is generally not recommended to continue driving with this code present, as it can lead to poor engine performance and potential damage. It is best to address the issue promptly to prevent further complications.

7. How much does it cost to fix the Ignition Coil 3 Control Circuit Low Voltage problem in a 2014 GMC Sierra?

The cost of repair can vary depending on the exact cause of the issue and whether it can be resolved by replacing a faulty ignition coil, repairing wiring, or addressing other related components. It is advisable to consult a professional mechanic for an accurate estimate.

8. Can a DIY enthusiast fix the P2306 OBDII code related to Ignition Coil 3 Control Circuit Low Voltage in a 2014 GMC Sierra?

While some DIY enthusiasts may be able to diagnose and replace a faulty ignition coil, addressing wiring or PCM issues may require specialized tools and expertise. It is important to assess your own skills and comfort level before attempting any repairs.

9. Will resetting the OBDII code P2306 in a 2014 GMC Sierra make the issue go away?

Resetting the code may temporarily clear the warning light, but if the underlying issue causing the Ignition Coil 3 Control Circuit Low Voltage problem is not addressed, the code is likely to reappear once the vehicle is driven again.

10. How long does it take to fix the P2306 code related to Ignition Coil 3 Control Circuit Low Voltage in a 2014 GMC Sierra?

The repair time can vary depending on the specific cause of the issue and the complexity of the repair needed. Simple fixes like replacing an ignition coil may take less time, while diagnosing and repairing wiring issues or addressing PCM problems can be more time-consuming.

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