AutoCodes – GMC – P2306 2018 GMC Sierra

P2306 2018 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 2018 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 185

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 2018 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 2018 GMC Sierra - Ignition Coil 3 Control Circuit Low Voltage - AutoCodes.com — P2306 2018 GMC Sierra Code - Ignition Coil 3 Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2306 2018 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 2018 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 2018 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 2018 GMC Sierra 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 2018 GMC Sierra Code

1. What are common symptoms of OBDII code P2306 in a 2018 GMC Sierra related to Ignition Coil 3 Control Circuit Low Voltage?

- Common symptoms include engine misfires, rough idling, loss of power, and potentially stalling.

2. What are the possible causes of OBDII code P2306 in a 2018 GMC Sierra?

- The code P2306 may indicate issues such as a faulty ignition coil, damaged wiring or connectors, a defective PCM, or a problem with the spark plug.

3. How can I diagnose the source of OBDII code P2306 in my 2018 GMC Sierra?

- To diagnose the issue, you can perform a visual inspection of the ignition coil and related components, check the wiring for any damage, test the coil's resistance, and use a scan tool to monitor live data while the engine is running.

4. Can driving with OBDII code P2306 in a 2018 GMC Sierra cause further damage?

- Continuing to drive with the code P2306 can potentially lead to permanent damage to the ignition system, reduced fuel efficiency, and further engine performance issues.

5. Is it safe to continue driving my 2018 GMC Sierra with OBDII code P2306 related to Ignition Coil 3 Control Circuit Low Voltage?

- It is not recommended to drive the vehicle with this code active, as it can lead to poor engine performance and potentially leave you stranded.

6. How can I repair OBDII code P2306 in my 2018 GMC Sierra related to Ignition Coil 3 Control Circuit Low Voltage?

- Repair options include replacing the faulty ignition coil, repairing or replacing damaged wiring, ensuring proper connections, and resetting the trouble code with a scan tool after the repair is completed.

7. Can I reset OBDII code P2306 in my 2018 GMC Sierra without fixing the underlying issue?

- While you can clear the trouble code with a scan tool, it is crucial to address the underlying problem causing the code to prevent further issues.

8. How much does it typically cost to fix OBDII code P2306 in a 2018 GMC Sierra at a repair shop?

- The cost of repairing OBDII code P2306 can vary depending on the specific issue, but it may range from $100 to $300 or more, including parts and labor.

9. Are there any preventive maintenance measures I can take to avoid OBDII code P2306 in my 2018 GMC Sierra?

- Regularly inspecting and maintaining the ignition system, including checking the condition of spark plugs and ignition coils, can help prevent issues that trigger code P2306.

10. Will disconnecting the battery reset OBDII code P2306 in a 2018 GMC Sierra?

- Disconnecting the battery may clear the code temporarily, but it is recommended to address the root cause of the issue to prevent the code from reappearing.