AutoCodes – GMC – P2306 2014 GMC Sierra

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

Quick Answer

The ignition system on this engine uses ignition coils with integrated power transistors. Common causes include Faulty Ignition Coil 3, Ignition Coil 3 harness is open or shorted, Ignition Coil 3 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: P2306 2014 GMC Sierra indicates Ignition Coil 3 Control Circuit Low Voltage.
Common causes: Common causes include Faulty Ignition Coil 3, Ignition Coil 3 harness is open or shorted, Ignition Coil 3 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 200

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 25, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2306 2014 GMC Sierra Description

The ignition system on this engine uses ignition coils with integrated power transistors. The Engine Control Module (ECM) controls the spark event for each cylinder through individual ignition coil control circuits. When the ECM commands the ignition control circuit On, electrical current flows through the primary winding of the ignition coil, creating a magnetic field. When a spark event is requested, the ECM commands the ignition control circuit Off, interrupting current flow through the primary winding. The collapsing magnetic field created by the primary winding induces a high voltage in the secondary winding, which is connected to the spark plugs. The Diagnostic Trouble Code (DTC) will be set when the control circuit commanded by the ECM state does not match the actual state.

OBDII Code P2306 2014 GMC Sierra - Ignition Coil 3 Control Circuit Low Voltage - AutoCodes.com — P2306 2014 GMC Sierra Code - Ignition Coil 3 Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2306 2014 GMC Sierra?

Faulty Ignition Coil 3
Ignition Coil 3 harness is open or shorted
Ignition Coil 3 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2306 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 P2306 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 P2306 2014 GMC Sierra code?

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Need Help with the Code?

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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.