AutoCodes – Chevrolet – P2303 2014 Chevrolet Silverado

P2303 2014 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 2014 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 239

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 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 P2303 2014 Chevrolet Silverado - Ignition Coil 2 Control Circuit Low Voltage - AutoCodes.com — P2303 2014 Chevrolet Silverado Code - Ignition Coil 2 Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2303 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 P2303 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 P2303 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 P2303 2014 Chevrolet Silverado code?

Need more information on how to fix the P2303 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2303 2014 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 P2303 2014 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P2303 in a 2014 Chevrolet Silverado?

Symptoms may include engine misfires, rough idling, reduced engine performance, and illuminated Check Engine Light.

2. What does the OBDII code P2303 mean for a 2014 Chevrolet Silverado?

P2303 indicates a low voltage condition in the ignition coil 2 control circuit of the vehicle.

3. What are the possible causes of OBDII code P2303 in a 2014 Chevrolet Silverado?

Common causes include faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, or issues with the Engine Control Module (ECM).

4. How can I diagnose the source of OBDII code P2303 in my 2014 Chevrolet Silverado?

Diagnosis typically involves checking the ignition coil 2 and its connections for damage, testing the wiring for continuity, and inspecting the ECM for any signs of malfunction.

5. Can I still drive my 2014 Chevrolet Silverado with OBDII code P2303 active?

It is not recommended to drive the vehicle with this code active, as it can lead to further engine damage and reduced performance.

6. Is it possible to repair OBDII code P2303 in a 2014 Chevrolet Silverado at home?

Depending on your mechanical skills, you may be able to repair this issue at home by replacing the faulty ignition coil, repairing damaged wiring, or addressing any ECM issues.

7. Will resetting the Check Engine Light resolve OBDII code P2303 in a 2014 Chevrolet Silverado?

Simply clearing the code may temporarily turn off the light, but the underlying issue causing P2303 will persist and should be addressed to prevent further problems.

8. How much does it typically cost to repair OBDII code P2303 in a 2014 Chevrolet Silverado?

Costs can vary depending on the exact cause of the issue, but repairs for this code may range from $100 to $300, including parts and labor.

9. What are the long-term effects of ignoring OBDII code P2303 in a 2014 Chevrolet Silverado?

Ignoring this code can lead to continued engine misfires, potential damage to the catalytic converter, and overall decreased engine performance.

10. Can a professional mechanic help with diagnosing and repairing OBDII code P2303 in a 2014 Chevrolet Silverado?

Yes, seeking assistance from a qualified mechanic is advisable for accurate diagnosis and proper repair of OBDII code P2303 to ensure the vehicle's optimal performance and safety.