AutoCodes.com
Login with Google
AutoCodes – GMC – P2306 2016 GMC Sierra

P2306 2016 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 2016 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.
Save to My Repairs My Repairs
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 192
How popular is this code, among other codes? Low
What is this?
Table of contents Created and updated by William Orellana on Mar 25, 2024
💬 Need more help? Ask Coddy for instant answers — it's free!

Code P2306 2016 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 2016 GMC Sierra - Ignition Coil 3 Control Circuit Low Voltage - AutoCodes.com
P2306 2016 GMC Sierra Code - Ignition Coil 3 Control Circuit Low Voltage
What does this mean?

What are the Possible Causes of the DTC P2306 2016 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 2016 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 2016 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 2016 GMC Sierra code?

Need more information on how to fix the P2306 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2306 2016 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 2016 GMC Sierra Code

1. What does the OBDII code P2306 mean on a 2016 GMC Sierra?

P2306 indicates a low voltage issue in the ignition coil 3 control circuit, which may affect engine performance.

2. What are the symptoms of the P2306 code on a 2016 GMC Sierra?

Common symptoms include engine misfires, rough idling, reduced power, and the check engine light turning on.

3. What causes the P2306 code on a 2016 GMC Sierra?

Possible causes include a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, or a malfunctioning Powertrain Control Module (PCM).

4. How do I diagnose the P2306 code on a 2016 GMC Sierra?

Start by inspecting the ignition coil 3 and its wiring for damage or corrosion. Use a multimeter to test the coil and circuit for proper voltage and continuity.

5. Can I drive my 2016 GMC Sierra with the P2306 code?

Driving with this code is not recommended, as it can cause misfires that may damage the catalytic converter and reduce engine performance.

6. How do I fix the P2306 code on my 2016 GMC Sierra?

Repairs may include replacing the faulty ignition coil, repairing or replacing damaged wiring or connectors, or reprogramming the PCM if necessary.

7. How much does it cost to fix the P2306 code on a 2016 GMC Sierra?

Repair costs can vary, but replacing an ignition coil typically ranges from $100 to $300, including parts and labor.

8. Can a bad spark plug cause the P2306 code on a 2016 GMC Sierra?

While unlikely, a worn or damaged spark plug can contribute to ignition issues and should be inspected when diagnosing this code.

9. How can I prevent the P2306 code from occurring on my 2016 GMC Sierra?

Regular maintenance, such as inspecting ignition components and keeping wiring and connectors clean, can help prevent this issue.

10. Will clearing the P2306 code with a scanner fix the problem?

Clearing the code may turn off the check engine light temporarily, but the underlying issue must be repaired to prevent the code from returning.

Discuss the causes and fixes for P2306 2016 GMC Sierra OBDII Code

Submit a New Comment

Code P2306 2016 GMC Sierra comments

No comments found for this page.

AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play