AutoCodes – Cadillac – P2306 Cadillac

P2306 Cadillac 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 Cadillac 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 757

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 P2306 Cadillac 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 Cadillac - Ignition Coil 3 Control Circuit Low Voltage - AutoCodes.com — P2306 Cadillac Code - Ignition Coil 3 Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2306 Cadillac?

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 Cadillac?

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 Cadillac 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.

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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 Cadillac Code

1. What does OBDII code P2306 for Cadillac mean?

The code P2306 indicates a problem with the ignition coil 3 control circuit, specifically low voltage.

2. What are the common symptoms of a P2306 code in a Cadillac?

Common symptoms include rough idling, engine misfires, loss of power, and the Check Engine Light turning on.

3. What are the possible causes of a P2306 code in a Cadillac?

Possible causes include a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, a problem with the PCM, or a weak battery.

4. How can I diagnose a P2306 code in my Cadillac?

Diagnosing a P2306 code involves checking the ignition coil 3 for proper functioning, inspecting the wiring and connectors for damage, and using a scan tool to analyze the circuit voltage.

5. Can I drive my Cadillac with a P2306 code?

It is not recommended to drive your Cadillac with a P2306 code, as it can lead to further damage to the engine or catalytic converter.

6. How do I repair a P2306 code in my Cadillac?

Repairing a P2306 code may involve replacing the faulty ignition coil, repairing damaged wiring or connectors, resetting the PCM, or addressing any underlying battery issues.

7. Can a DIYer fix a P2306 code in a Cadillac?

While some DIYers may have the skills to diagnose and repair a P2306 code, it is recommended to seek professional help for accurate diagnosis and proper repair.

8. How much does it cost to fix a P2306 code in a Cadillac?

The cost of fixing a P2306 code in a Cadillac can vary depending on the exact cause of the issue, parts needed for repair, and labor costs at the repair shop.

9. Will a P2306 code reset itself after repair in a Cadillac?

After repairing the underlying issue causing the P2306 code, you may need to use a scan tool to clear the code and reset the Check Engine Light in your Cadillac.

10. How can I prevent a P2306 code from occurring in my Cadillac?

To prevent a P2306 code, it is recommended to perform regular maintenance checks on your ignition system, address any issues promptly, and avoid driving with weak or faulty components.