AutoCodes – GMC – P2301 2018 GMC Sierra

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

Quick Answer

The ignition system on this engine uses ignition coils with integrated power transistors. Common causes include Faulty Ignition Coil 1, Ignition Coil 1 harness is open or shorted, Ignition Coil 1 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: P2301 2018 GMC Sierra indicates Ignition Coil 1 Control Circuit High Voltage.
Common causes: Common causes include Faulty Ignition Coil 1, Ignition Coil 1 harness is open or shorted, Ignition Coil 1 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 169

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 P2301 2018 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 P2301 2018 GMC Sierra - Ignition Coil 1 Control Circuit High Voltage - AutoCodes.com — P2301 2018 GMC Sierra Code - Ignition Coil 1 Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2301 2018 GMC Sierra?

Faulty Ignition Coil 1
Ignition Coil 1 harness is open or shorted
Ignition Coil 1 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2301 2018 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 P2301 2018 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 P2301 2018 GMC Sierra code?

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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.