AutoCodes – Chevrolet – P2303 2017 Chevrolet Silverado

P2303 2017 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 2017 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 338

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 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 P2303 2017 Chevrolet Silverado - Ignition Coil 2 Control Circuit Low Voltage - AutoCodes.com — P2303 2017 Chevrolet Silverado Code - Ignition Coil 2 Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2303 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 P2303 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 P2303 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 P2303 2017 Chevrolet Silverado code?

Need more information on how to fix the P2303 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals

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Get the P2303 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 P2303 2017 Chevrolet Silverado Code

1. What are common symptoms of OBDII code P2303 in a 2017 Chevrolet Silverado?

The common symptoms of code P2303 in a 2017 Chevrolet Silverado include engine misfires, rough idling, decreased fuel efficiency, and potential stalling.

2. What does the OBDII code P2303 indicate in a 2017 Chevrolet Silverado?

Code P2303 in a 2017 Chevrolet Silverado indicates a problem with the Ignition Coil 2 Control Circuit, specifically low voltage being detected.

3. What are the possible causes of OBDII code P2303 in a 2017 Chevrolet Silverado?

Potential causes of code P2303 in a 2017 Chevrolet Silverado include a 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 Ignition Coil 2 Control Circuit issue causing code P2303 in my 2017 Chevrolet Silverado?

To diagnose the issue, you can start by inspecting the wiring and connectors related to the ignition coil, testing the ignition coil itself for proper function, and using a multimeter to check for voltage irregularities.

5. Can I continue driving my 2017 Chevrolet Silverado with OBDII code P2303 present?

It is not recommended to continue driving your 2017 Chevrolet Silverado with code P2303 present, as it can lead to further engine damage and potential safety hazards.

6. How can I repair OBDII code P2303 in my 2017 Chevrolet Silverado?

Repairing code P2303 in a 2017 Chevrolet Silverado typically involves replacing the faulty ignition coil, repairing any damaged wiring or connectors, and clearing the trouble codes with an OBDII scanner.

7. Is it possible to prevent OBDII code P2303 from occurring in my 2017 Chevrolet Silverado?

While some instances of code P2303 may be unavoidable due to component failures, regular vehicle maintenance, such as checking and replacing ignition components as needed, can help prevent this issue.

8. Can a DIY enthusiast fix OBDII code P2303 in a 2017 Chevrolet Silverado?

Depending on the DIY enthusiast's skill level and access to tools, it may be possible to fix code P2303 by following repair guides and instructions specific to the Chevrolet Silverado model.

9. How long does it typically take to repair OBDII code P2303 in a 2017 Chevrolet Silverado?

The repair time for code P2303 in a 2017 Chevrolet Silverado can vary depending on the extent of the issue and the expertise of the person performing the repair, but it generally takes a few hours to complete.

10. Are there any recalls or technical service bulletins related to OBDII code P2303 in a 2017 Chevrolet Silverado?

It is recommended to check with a Chevrolet dealership or online resources for any relevant recalls or technical service bulletins related to code P2303 in a 2017 Chevrolet Silverado to ensure all available resources are utilized for the repair.