AutoCodes – Buick – P2307 Buick

P2307 Buick Code - Ignition Coil 3 Control Circuit High 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: P2307 Buick indicates Ignition Coil 3 Control Circuit High 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 531

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 Jul 31, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2307 Buick 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 P2307 Buick - Ignition Coil 3 Control Circuit High Voltage - AutoCodes.com — P2307 Buick Code - Ignition Coil 3 Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2307 Buick?

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 P2307 Buick?

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 P2307 Buick 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 P2307 Buick code?

Need more information on how to fix the P2307 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2307 Buick 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 P2307 Buick Code

1. What are common symptoms of OBDII code P2307 in a Buick related to ignition coil 3?

Common symptoms include engine misfires, rough idle, loss of power, and difficulty starting the vehicle.

2. What can cause the ignition coil 3 control circuit high voltage issue in a Buick?

Possible causes include a faulty ignition coil, damaged wiring or connectors, a malfunctioning powertrain control module (PCM), or a short circuit.

3. How can I diagnose the high voltage issue with ignition coil 3 in my Buick?

Use a multimeter to check the resistance of the ignition coil, inspect the wiring and connectors for damage, and perform a scan tool test to monitor the PCM's control of the ignition coil.

4. Can driving with OBDII code P2307 in a Buick cause further damage?

Continuing to drive with this issue can lead to permanent damage to the ignition coil, catalytic converter, and other engine components, so prompt attention is recommended.

5. Is it safe to reset the OBDII code P2307 in a Buick without addressing the underlying problem?

Resetting the code without fixing the root cause will only temporarily clear the error code, and the issue will likely reoccur, impacting the vehicle's performance.

6. What is the typical cost to repair the ignition coil 3 control circuit high voltage problem in a Buick?

The cost of repairs can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

7. Can I replace the faulty ignition coil in my Buick myself to resolve code P2307?

If you have the necessary tools and experience, replacing the ignition coil yourself is possible. However, if you're unsure, it's best to consult a professional mechanic.

8. How important is it to address OBDII code P2307 promptly in a Buick?

Ignoring this code can lead to more severe engine issues and potential safety hazards, so it's crucial to address the problem as soon as possible.

9. Are there any preventive measures to avoid the ignition coil 3 control circuit high voltage problem in a Buick?

Regular maintenance, such as inspecting and replacing ignition components at recommended intervals, can help prevent issues like code P2307 from occurring.

10. Can a low battery voltage trigger OBDII code P2307 in a Buick?

Yes, low battery voltage can affect the operation of the ignition system and potentially trigger the high voltage issue with ignition coil 3, so ensuring the battery is in good condition is important.