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Engine-Codes – GMC – P2322 2018 GMC Sierra

P2322 2018 GMC Sierra Code - Ignition Coil 8 Control Circuit High Voltage

Quick Answer

The P2322 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates an issue with the Ignition Coil 8 Control Circuit High Voltage. Common causes include Faulty ignition coil in cylinder 8, Damaged wiring or connectors in the control circuit, Malfunctioning 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
P2322 2018 GMC Sierra indicates Ignition Coil 8 Control Circuit High Voltage.
Common causes
Common causes include Faulty ignition coil in cylinder 8, Damaged wiring or connectors in the control circuit, Malfunctioning 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 17, 2024
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Code P2322 2018 GMC Sierra Description

The P2322 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates an issue with the Ignition Coil 8 Control Circuit High Voltage. This code specifically points to a problem with the control circuit for the ignition coil in cylinder 8 of the engine. The ignition coil is responsible for converting the low voltage from the battery into the high voltage needed to create a spark in the spark plugs, which ignites the air-fuel mixture in the combustion chamber. When the control circuit for the ignition coil in cylinder 8 is registering high voltage, it can lead to a range of issues affecting the vehicle's performance.

OBDII Code P2322 2018 GMC Sierra - Ignition Coil 8 Control Circuit High Voltage
P2322 2018 GMC Sierra Code - Ignition Coil 8 Control Circuit High Voltage

Common Causes of P2322 2018 GMC Sierra

  1. Faulty ignition coil in cylinder 8
  2. Damaged wiring or connectors in the control circuit
  3. Malfunctioning engine control module (ECM)
  4. Issues with the power supply to the ignition coil
  5. Environmental factors such as moisture or corrosion

Symptoms of P2322 2018 GMC Sierra

  1. Engine misfires or rough idling
  2. Decreased fuel efficiency
  3. Loss of power during acceleration
  4. Illumination of the check engine light
  5. Engine stalling

How to Fix P2322 2018 GMC Sierra

  1. Begin by diagnosing the specific cause of the high voltage in the ignition coil 8 control circuit using a diagnostic scanner to pinpoint the issue.
  2. Inspect the ignition coil in cylinder 8 for any signs of damage or malfunction and replace if necessary.
  3. Check the wiring and connectors in the control circuit for any breaks, corrosion, or loose connections, repairing or replacing them as needed.
  4. Test the engine control module (ECM) to ensure it is functioning correctly, replacing it if it is found to be faulty.
  5. Verify the power supply to the ignition coil is stable and within the manufacturer's specifications, addressing any issues with the power source.

Cost to Fix P2322 2018 GMC Sierra

The typical repair costs for addressing the P2322 code on a 2018 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. Generally, replacing an ignition coil can cost between $100 to $300, while diagnosing and repairing wiring or connector issues may add to the total cost. Including parts and labor, the total repair cost could range from $200 to $500 or more. It's important to consult with a qualified mechanic or auto repair shop to get an accurate estimate based on your vehicle's needs and location. Labor rates at auto repair shops can vary, with hourly rates typically ranging between $80 and $150.

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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 P2322 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code P2322 in a 2018 GMC Sierra related to Ignition Coil 8 Control Circuit High Voltage?

- Common symptoms include rough engine performance, misfires, loss of power, and illuminated Check Engine light.

2. What are the potential causes of OBDII code P2322 in a 2018 GMC Sierra?

- Causes can include a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, or issues with the Engine Control Module (ECM).

3. How can I diagnose the issue causing OBDII code P2322 in my 2018 GMC Sierra?

- Diagnose by visually inspecting the ignition coil and its connections, testing the coil's resistance, checking for damaged wires or connectors, and using a scan tool to monitor the ignition system.

4. Can I continue to drive my 2018 GMC Sierra with OBDII code P2322 present?

- It is not recommended to drive the vehicle with this code active, as it can lead to further damage to the engine and emissions components.

5. What are the repair options for fixing OBDII code P2322 in a 2018 GMC Sierra?

- Repair options include replacing the faulty ignition coil, repairing damaged wiring or connectors, or reprogramming the ECM if necessary.

6. How much does it typically cost to repair OBDII code P2322 in a 2018 GMC Sierra?

- Costs can vary depending on the specific issue, but replacing an ignition coil can range from $100 to $300, while more extensive repairs involving wiring or the ECM may cost more.

7. Are there any preventive maintenance tips to avoid OBDII code P2322 in a 2018 GMC Sierra?

- Regularly inspecting and maintaining the ignition system components, such as the ignition coil and related wiring, can help prevent issues that may trigger this code.

8. Can a DIY enthusiast with basic mechanical skills repair OBDII code P2322 in a 2018 GMC Sierra?

- Depending on the specific issue, some DIY repairs may be possible, such as replacing the ignition coil. However, more complex issues may require professional diagnosis and repair.

9. Will resetting the Check Engine light clear OBDII code P2322 in a 2018 GMC Sierra?

- Resetting the light may temporarily clear the code, but it will return if the underlying issue causing it is not addressed.

10. How can I ensure that OBDII code P2322 is properly diagnosed and repaired in my 2018 GMC Sierra?

- To ensure proper diagnosis and repair, it is recommended to consult a qualified mechanic or dealership with experience working on GMC vehicles and diagnosing ignition system issues.

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