AutoCodes – Chevrolet – P2303 2015 Chevrolet Silverado

P2303 2015 Chevrolet Silverado Code - Ignition Coil 2 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 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: P2303 2015 Chevrolet Silverado indicates Ignition Coil 2 Control Circuit Low 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 191

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 P2303 2015 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 P2303 2015 Chevrolet Silverado - Ignition Coil 2 Control Circuit Low Voltage - AutoCodes.com — P2303 2015 Chevrolet Silverado Code - Ignition Coil 2 Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2303 2015 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 P2303 2015 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 P2303 2015 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 P2303 2015 Chevrolet Silverado code?

Need more information on how to fix the P2303 2015 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 P2303 2015 Chevrolet Silverado Code

What does the OBDII code P2303 mean on a 2015 Chevrolet Silverado?

P2303 refers to "Ignition Coil 2 Control Circuit Low Voltage," which indicates a problem with the voltage or signal in the ignition coil circuit for cylinder 2.

What are the common symptoms of code P2303 in a 2015 Chevy Silverado?

Common symptoms include engine misfires, rough idling, reduced fuel efficiency, difficulty starting, and the Check Engine Light turning on.

What causes the P2303 code to appear?

Potential causes include a faulty ignition coil, damaged wiring or connectors in the ignition circuit, a malfunctioning powertrain control module (PCM), or corrosion in the electrical connections.

Can I drive my 2015 Chevy Silverado with a P2303 code?

Driving with the P2303 code is not recommended, as it can lead to engine misfires and potential damage to the catalytic converter or other engine components.

How do I diagnose the P2303 code on my Silverado?

Start by inspecting the wiring and connectors for damage or corrosion in the ignition coil circuit. Use a multimeter to test the ignition coil and check for proper voltage and continuity.

How is the P2303 code typically fixed?

The repair may involve replacing the faulty ignition coil, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming or replacing the PCM if necessary.

How much does it cost to fix a P2303 code on a 2015 Chevy Silverado?

Repair costs can range from $100 to $300, depending on whether you need to replace the ignition coil, repair wiring, or address PCM issues.

Can a bad spark plug cause a P2303 code?

While unlikely, a bad spark plug can contribute to ignition problems, but the code specifically points to an issue with the ignition coil circuit.

What tools do I need to troubleshoot the P2303 code?

Youâ€™ll need an OBDII scanner, a multimeter to test voltage and continuity, and basic tools to inspect and repair wiring or replace the ignition coil.

Can a dirty ignition coil connector trigger the P2303 code?

Yes, dirt or corrosion on the ignition coil connector can disrupt the electrical signal and lead to the P2303 code being set. Cleaning the connector may resolve the issue.