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Engine-Codes – GMC – P2301 2018 GMC Sierra

P2301 2018 GMC Sierra Code - Ignition Coil 1 Control Circuit High Voltage

Quick Answer

The P2301 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates a problem with the ignition coil 1 control circuit having high voltage. Common causes include Faulty ignition coil, Damaged wiring or connectors in the control circuit, Issues with the engine control module (ECM). 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
P2301 2018 GMC Sierra indicates Ignition Coil 1 Control Circuit High Voltage.
Common causes
Common causes include Faulty ignition coil, Damaged wiring or connectors in the control circuit, Issues with the engine control module (ECM).
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 19, 2024
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Code P2301 2018 GMC Sierra Description

The P2301 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates a problem with the ignition coil 1 control circuit having high voltage. The ignition coil is a crucial component in the vehicle's ignition system, responsible for converting the low voltage from the battery into the high voltage needed to create a spark in the spark plugs. When the control circuit for ignition coil 1 is experiencing high voltage, it can lead to various issues that affect the vehicle's performance.

OBDII Code P2301 2018 GMC Sierra - Ignition Coil 1 Control Circuit High Voltage
P2301 2018 GMC Sierra Code - Ignition Coil 1 Control Circuit High Voltage

Common Causes of P2301 2018 GMC Sierra

  1. Faulty ignition coil
  2. Damaged wiring or connectors in the control circuit
  3. Issues with the engine control module (ECM)
  4. Problems with the power supply to the ignition coil
  5. Environmental factors such as moisture or corrosion

Symptoms of P2301 2018 GMC Sierra

  1. Engine misfires
  2. Rough idling or vibrations
  3. Decreased fuel efficiency
  4. Engine stalling
  5. Illumination of the check engine light

How to Fix P2301 2018 GMC Sierra

  1. Diagnose the specific cause of the high voltage in the ignition coil 1 control circuit using a scan tool to read the DTC and perform further testing if necessary.
  2. Inspect the ignition coil, wiring, and connectors for any visible damage or wear.
  3. Replace the faulty ignition coil if necessary, ensuring that the new part is compatible with the vehicle's make and model.
  4. Repair or replace any damaged wiring or connectors in the control circuit.
  5. Clear the DTC and test drive the vehicle to ensure that the issue has been resolved and that the check engine light does not reappear.

Cost to Fix P2301 2018 GMC Sierra

The typical repair costs for addressing a P2301 code on a 2018 GMC Sierra can vary depending on the specific cause of the issue and the cost of parts and labor. In general, the cost of replacing an ignition coil can range from $100 to $300, while the cost of labor can range from $80 to $150 per hour. Additional costs may be incurred if there are other underlying issues that need to be addressed. It's advisable to consult with a qualified mechanic or auto repair shop to get an accurate estimate based on the specific circumstances of the vehicle.

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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 P2301 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code P2301 on a 2018 GMC Sierra?

The common symptoms of OBDII code P2301 (Ignition Coil 1 Control Circuit High Voltage) on a 2018 GMC Sierra may include engine misfires, rough idling, loss of power, and illuminated Check Engine Light.

2. What are the possible causes of OBDII code P2301 on a 2018 GMC Sierra?

The possible causes of OBDII code P2301 on a 2018 GMC Sierra include a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, a defective Engine Control Module (ECM), or a short circuit in the wiring.

3. How can I diagnose OBDII code P2301 on my 2018 GMC Sierra?

To diagnose OBDII code P2301 on a 2018 GMC Sierra, you can use an OBDII scanner to retrieve the specific trouble code. Then, visually inspect the ignition coil and its wiring for any visible damage. Testing the resistance of the ignition coil and checking the voltage at the coil can also help pinpoint the issue.

4. Can I still drive my 2018 GMC Sierra with OBDII code P2301?

It is not recommended to drive your 2018 GMC Sierra with OBDII code P2301 (Ignition Coil 1 Control Circuit High Voltage) as it can lead to further engine damage, reduced performance, and potential safety hazards. It's best to address the issue promptly.

5. How do I repair OBDII code P2301 on my 2018 GMC Sierra?

Repairing OBDII code P2301 on a 2018 GMC Sierra involves identifying the root cause of the high voltage in the ignition coil circuit. This may require replacing the faulty ignition coil, repairing damaged wiring or connectors, and resetting the trouble code with an OBDII scanner.

6. What are some tips to prevent OBDII code P2301 from recurring on my 2018 GMC Sierra?

To prevent OBDII code P2301 from recurring on your 2018 GMC Sierra, ensure regular maintenance of your vehicle's ignition system, including checking and replacing ignition coils at the recommended intervals. Also, be mindful of any signs of engine misfires or rough idling that may indicate potential issues.

7. Is it safe to clear OBDII code P2301 on my 2018 GMC Sierra without fixing the underlying problem?

Clearing OBDII code P2301 (Ignition Coil 1 Control Circuit High Voltage) on your 2018 GMC Sierra without fixing the underlying problem is not recommended. It may temporarily turn off the Check Engine Light, but the issue causing the code will persist, potentially leading to more severe problems in the future.

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