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Engine-Codes – GMC – P2303 2016 GMC Sierra

P2303 2016 GMC Sierra Code - Ignition Coil 2 Control Circuit Low Voltage

Quick Answer

The diagnostic trouble code P2303 for a 2016 GMC Sierra indicates a problem with the ignition coil 2 control circuit experiencing low voltage. Common causes include Faulty ignition coil, Wiring issues in the control circuit, Poor connection or corrosion in the electrical system. 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, Wiring issues in the control circuit, Poor connection or corrosion in the electrical system.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P2303 2016 GMC Sierra Description

The diagnostic trouble code P2303 for a 2016 GMC Sierra indicates a problem with the ignition coil 2 control circuit experiencing low voltage. The ignition coil is a crucial component of the vehicle's ignition system, responsible for generating the high voltage necessary to ignite the air-fuel mixture in the engine cylinders. In this case, the control circuit for the ignition coil 2 is not receiving the proper voltage, which can lead to issues with ignition timing, engine performance, and fuel efficiency.

OBDII Code P2303 2016 GMC Sierra - Ignition Coil 2 Control Circuit Low Voltage
P2303 2016 GMC Sierra Code - Ignition Coil 2 Control Circuit Low Voltage

Common Causes of P2303 2016 GMC Sierra

  1. Faulty ignition coil
  2. Wiring issues in the control circuit
  3. Poor connection or corrosion in the electrical system
  4. Defective ECM
  5. Environmental factors such as moisture or heat affecting electrical components

Symptoms of P2303 2016 GMC Sierra

  1. Engine misfires
  2. Rough idling or vibrations
  3. Loss of power or acceleration
  4. Stalling of the engine
  5. Illumination of the Check Engine Light

How to Fix P2303 2016 GMC Sierra

  1. Diagnose the issue using a diagnostic scanner to confirm the P2303 code and identify the specific cause of the low voltage in the ignition coil 2 control circuit.
  2. Inspect the ignition coil, wiring, and connections for any visible damage or corrosion. Replace any faulty components.
  3. Test the voltage in the control circuit to ensure it meets the manufacturer's specifications.
  4. Clear the trouble code from the ECM memory and perform a road test to verify that the issue has been resolved.
  5. If the problem persists, further diagnosis may be required to check for more complex electrical issues or component failures.

Cost to Fix P2303 2016 GMC Sierra

The typical repair costs for addressing the P2303 code on a 2016 GMC Sierra can vary depending on the specific cause of the issue. In general, replacement of the ignition coil or repairing wiring/connectivity problems can range from $100 to $300 in parts, with additional labor costs of $100 to $200. However, as mentioned earlier, actual repair costs can vary significantly based on factors such as location, vehicle make and model, and labor rates at the auto repair shop. It's recommended to obtain multiple quotes from reputable mechanics to get a more accurate estimate.

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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 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.

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