AutoCodes – GMC – P2303 2016 GMC Sierra

P2303 2016 GMC Sierra 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 2016 GMC Sierra 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 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 P2303 2016 GMC Sierra 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 2016 GMC Sierra - Ignition Coil 2 Control Circuit Low Voltage - AutoCodes.com — P2303 2016 GMC Sierra Code - Ignition Coil 2 Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2303 2016 GMC Sierra?

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 2016 GMC Sierra?

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 2016 GMC Sierra 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 2016 GMC Sierra code?

Need more information on how to fix the P2303 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2303 2016 GMC Sierra 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 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P2303 in a 2016 GMC Sierra?

The common symptoms of OBDII code P2303 (Ignition Coil 2 Control Circuit Low Voltage) in a 2016 GMC Sierra may include engine misfires, rough idling, decreased fuel efficiency, and illuminated check engine light.

2. What can cause the OBDII code P2303 in a 2016 GMC Sierra?

The OBDII code P2303 in a 2016 GMC Sierra is typically caused by issues with the ignition coil 2 control circuit, such as a faulty ignition coil, damaged wiring, or a poor electrical connection.

3. How can I diagnose the OBDII code P2303 in my 2016 GMC Sierra?

To diagnose the OBDII code P2303 in a 2016 GMC Sierra, you can use an OBDII scanner to retrieve the trouble codes, visually inspect the ignition coil and related wiring, perform a continuity test on the circuit, and test the voltage output of the ignition coil.

4. Can I still drive my 2016 GMC Sierra with the OBDII code P2303?

It is not recommended to drive your 2016 GMC Sierra with the OBDII code P2303 (Ignition Coil 2 Control Circuit Low Voltage) as it can lead to further damage to the ignition system and potentially cause engine performance issues.

5. How do I repair the OBDII code P2303 in my 2016 GMC Sierra?

To repair the OBDII code P2303 in a 2016 GMC Sierra, you may need to replace the faulty ignition coil, repair any damaged wiring or connectors, and clear the trouble codes with an OBDII scanner.

6. Can a DIY enthusiast fix the OBDII code P2303 in a 2016 GMC Sierra?

While some DIY enthusiasts may be able to diagnose and repair the OBDII code P2303 in a 2016 GMC Sierra, it is recommended to seek help from a professional mechanic for proper diagnosis and repair to ensure the issue is resolved correctly.

7. How much does it cost to fix the OBDII code P2303 in a 2016 GMC Sierra?

The cost to fix the OBDII code P2303 in a 2016 GMC Sierra can vary depending on the root cause of the issue, the cost of parts, and the labor rates of the repair shop. It is advisable to get a few quotes from different mechanics to compare prices.

8. Will resetting the OBDII code P2303 in my 2016 GMC Sierra make it go away permanently?

Simply resetting the OBDII code P2303 in a 2016 GMC Sierra will not make it go away permanently if the underlying issue is not addressed. It is important to diagnose and repair the root cause of the problem to prevent the code from reoccurring.

9. Is the OBDII code P2303 in a 2016 GMC Sierra a serious issue?

The OBDII code P2303 (Ignition Coil 2 Control Circuit Low Voltage) in a 2016 GMC Sierra should be taken seriously as it can lead to engine performance issues and potential damage to the ignition system if left unresolved.

10. How often does the OBDII code P2303 occur in a 2016 GMC Sierra?

The occurrence of the OBDII code P2303 (Ignition Coil 2 Control Circuit Low Voltage) in a 2016 GMC Sierra can vary depending on factors such as the vehicle's maintenance history, driving conditions, and overall health of the ignition system.