AutoCodes – Chevrolet – P2304 2017 Chevrolet Silverado

P2304 2017 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 2017 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 225

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 2017 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 2017 Chevrolet Silverado - Ignition Coil 2 Control Circuit High Voltage - AutoCodes.com — P2304 2017 Chevrolet Silverado Code - Ignition Coil 2 Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2304 2017 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 2017 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 2017 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 2017 Chevrolet Silverado code?

Need more information on how to fix the P2304 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals

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Get the P2304 2017 Chevrolet Silverado 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 P2304 2017 Chevrolet Silverado Code

1. What does the OBDII code P2304 mean for a 2017 Chevrolet Silverado?

P2304 indicates an issue with the ignition coil 2 control circuit, specifically that the voltage is higher than expected.

2. What are the common symptoms of code P2304 in a 2017 Chevrolet Silverado?

Symptoms may include rough idling, engine misfires, poor acceleration, decreased fuel efficiency, and the Check Engine Light turning on.

3. What causes the P2304 code to appear in a 2017 Chevrolet Silverado?

Common causes include a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, a defective ECM (Engine Control Module), or corrosion on electrical components.

4. Can a bad ignition coil trigger the P2304 code?

Yes, a faulty ignition coil 2 is one of the most common reasons for this code.

5. How can I diagnose the P2304 code in my Silverado?

Start by visually inspecting the ignition coil 2 and its wiring for damage or corrosion. Use a multimeter to test for proper voltage and continuity in the circuit. Scanning for additional trouble codes may also help pinpoint the issue.

6. Can I drive my 2017 Chevrolet Silverado with a P2304 code?

Driving with this code is not recommended, as it can lead to engine misfires, reduced performance, and potential long-term engine damage.

7. How is the P2304 code fixed on a 2017 Chevrolet Silverado?

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

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

Repair costs can vary, but replacing an ignition coil typically costs between $100 and $300, including parts and labor. Wiring repairs or ECM replacement may increase the cost.

9. Can a weak battery cause the P2304 code?

A weak or failing battery can sometimes cause electrical issues that trigger codes like P2304, though this is less common.

10. Do I need a professional to fix the P2304 code on my Silverado?

If you're experienced with automotive repairs, you may be able to fix it yourself. However, if the issue involves the ECM or complex wiring, professional assistance is recommended.