AutoCodes – Chevrolet – P2304 2014 Chevrolet Silverado

P2304 2014 Chevrolet Silverado Code - Ignition Coil 2 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 2, Ignition Coil 2 harness is open or shorted, Ignition Coil 2 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: P2304 2014 Chevrolet Silverado indicates Ignition Coil 2 Control Circuit High Voltage.
Common causes: Common causes include Faulty Ignition Coil 2, Ignition Coil 2 harness is open or shorted, Ignition Coil 2 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 P2304 2014 Chevrolet Silverado 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 P2304 2014 Chevrolet Silverado - Ignition Coil 2 Control Circuit High Voltage - AutoCodes.com — P2304 2014 Chevrolet Silverado Code - Ignition Coil 2 Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2304 2014 Chevrolet Silverado?

Faulty Ignition Coil 2
Ignition Coil 2 harness is open or shorted
Ignition Coil 2 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2304 2014 Chevrolet Silverado?

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 P2304 2014 Chevrolet Silverado 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 P2304 2014 Chevrolet Silverado code?

Need more information on how to fix the P2304 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 P2304 2014 Chevrolet Silverado Code

1. What does OBDII code P2304 mean on a 2014 Chevrolet Silverado?

P2304 indicates a high voltage issue in the ignition coil 2 control circuit, which can affect the engine's ignition system performance.

2. What are the symptoms of code P2304 on a 2014 Chevrolet Silverado?

Symptoms may include a misfire in cylinder 2, rough idling, reduced engine performance, poor fuel efficiency, and the Check Engine Light being illuminated.

3. What causes the P2304 code to appear in my Silverado?

Common causes include a faulty ignition coil 2, damaged or corroded wiring in the ignition coil circuit, a defective spark plug, or a malfunctioning Powertrain Control Module (PCM).

4. Can I drive my 2014 Silverado with a P2304 code?

Itâ€™s not recommended to drive for an extended period with this code, as it can lead to misfires and potential damage to the catalytic converter or other engine components.

5. How do I diagnose the P2304 code on my Silverado?

Start by inspecting the ignition coil 2 and its wiring for damage or corrosion. Use a multimeter to test for proper voltage and continuity and scan for any related misfire codes.

6. How do I fix the P2304 code on a 2014 Chevrolet Silverado?

Repairs may involve replacing the ignition coil 2, repairing or replacing damaged wiring, replacing the spark plug, or reprogramming or replacing the PCM if necessary.

7. How much does it cost to fix the P2304 code on a Silverado?

The cost varies depending on the repair. Replacing an ignition coil typically costs $50â€“$150 for parts, plus labor, while PCM replacement or programming can range from $200â€“$1,000.

8. Can a bad spark plug cause the P2304 code on my Silverado?

Yes, a defective spark plug can create excessive resistance, leading to high voltage in the ignition coil circuit and triggering the P2304 code.

9. How can I prevent the P2304 code from recurring?

Regular maintenance, such as inspecting and replacing spark plugs and ignition coils as needed, and ensuring wiring connections are clean and secure, can help prevent this issue.

10. Do I need special tools to fix the P2304 code on a 2014 Silverado?

Basic tools like a multimeter and an OBDII scanner are typically sufficient for diagnosing and repairing this issue, but advanced issues like PCM replacement may require professional equipment.