AutoCodes – GMC – P2309 2016 GMC Sierra

P2309 2016 GMC Sierra Code - Ignition Coil 4 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 4, Ignition Coil 4 harness is open or shorted, Ignition Coil 4 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: P2309 2016 GMC Sierra indicates Ignition Coil 4 Control Circuit Low Voltage.
Common causes: Common causes include Faulty Ignition Coil 4, Ignition Coil 4 harness is open or shorted, Ignition Coil 4 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 229

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 P2309 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 P2309 2016 GMC Sierra - Ignition Coil 4 Control Circuit Low Voltage - AutoCodes.com — P2309 2016 GMC Sierra Code - Ignition Coil 4 Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2309 2016 GMC Sierra?

Faulty Ignition Coil 4
Ignition Coil 4 harness is open or shorted
Ignition Coil 4 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2309 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 P2309 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 P2309 2016 GMC Sierra code?

Need more information on how to fix the P2309 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2309 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 P2309 2016 GMC Sierra Code

1. What are common symptoms of OBDII code P2309 on a 2016 GMC Sierra related to Ignition Coil 4 Control Circuit Low Voltage?

The common symptoms include misfires, rough idle, loss of power, and illuminated Check Engine Light.

2. What are the potential causes of OBDII code P2309 on a 2016 GMC Sierra?

Possible causes include a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, or a problem with the Engine Control Module (ECM).

3. How can I diagnose the issue causing OBDII code P2309 on my 2016 GMC Sierra?

You can diagnose the issue by visually inspecting the ignition coil and its connections, testing the coil for resistance, checking the wiring for damage, and using a scan tool to monitor live data and perform further testing.

4. Can I still drive my 2016 GMC Sierra with OBDII code P2309 present?

It is not recommended to drive your vehicle with this code present, as it can lead to further damage to the ignition system and potentially cause more serious issues.

5. How can I repair OBDII code P2309 on my 2016 GMC Sierra related to Ignition Coil 4 Control Circuit Low Voltage?

To repair the issue, you may need to replace the faulty ignition coil, repair damaged wiring or connectors, or reprogram the Engine Control Module (ECM) if necessary.

6. Will resetting the Check Engine Light resolve OBDII code P2309 on my 2016 GMC Sierra?

Resetting the Check Engine Light may temporarily turn it off, but it will not fix the underlying issue causing the code. It is essential to diagnose and repair the problem to prevent it from recurring.

7. How can I prevent OBDII code P2309 from appearing on my 2016 GMC Sierra in the future?

Regular maintenance, such as inspecting and replacing ignition components as needed, keeping the engine well-tuned, and addressing any issues promptly, can help prevent the recurrence of this code.

8. Can a DIY enthusiast repair OBDII code P2309 on a 2016 GMC Sierra?

Depending on your skill level and access to tools, a DIY enthusiast may be able to diagnose and repair the issue causing this code. However, if you are unsure or uncomfortable with the process, it is best to consult a professional mechanic.

9. Is it necessary to clear the OBDII code P2309 after repairing the issue on my 2016 GMC Sierra?

After repairing the issue causing the code, it is recommended to clear the code using a scan tool to reset the Check Engine Light and ensure that the problem has been resolved.

10. What should I do if I encounter OBDII code P2309 on my 2016 GMC Sierra but have limited automotive knowledge?

If you have limited automotive knowledge, it is best to seek assistance from a qualified mechanic who can diagnose the issue accurately and perform the necessary repairs to resolve OBDII code P2309.