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P2320 OBD2: Ignition Coil "G" Secondary Circuit

P2320 OBD2: Ignition Coil “G” Secondary Circuit

The P2320 code is an OBD-II trouble code that indicates a problem with the ignition coil “G” secondary circuit. This code often suggests that the engine control module (PCM) is unable to control the ignition coil correctly, leading to decreased engine performance and potential misfires.

What Does the P2320 Code Mean?

The P2320 code signifies that there is an issue with the secondary circuit of the ignition coil “G.” The ignition coil is responsible for igniting the air/fuel mixture in the combustion chamber. If the PCM cannot properly engage the ignition coil, it will trigger this diagnostic trouble code.

What Causes the P2320 Code?

Several factors can lead to the P2320 code, including:

  • Ignition coil failure
  • Powertrain Control Module (PCM) failure
  • Wiring issues or damaged connectors related to the ignition coil

What Are the Symptoms of the P2320 Code?

When the P2320 code is triggered, you may notice the following symptoms:

  • Decreased engine performance
  • Increased fuel consumption
  • Engine stumbling or misfiring during operation

How Serious Is the P2320 Code?

The P2320 code is classified as urgent. If left unaddressed, it can lead to severe engine damage and compromised vehicle safety. Immediate action is necessary to resolve this issue.

How to Diagnose the P2320 Code

To diagnose the P2320 code, follow these steps:

  1. Use an OBD-II scanner to confirm the presence of the P2320 code and check for any other related codes.
  2. Inspect the ignition coil and wiring for any visible damage or corrosion.
  3. Test the ignition coil’s primary and secondary resistance using a multimeter to ensure they are within the manufacturer’s specifications.
  4. Check the PCM for proper operation and any possible fault codes indicating PCM issues.

Common Repairs for the P2320 Code

If you encounter the P2320 code, common repairs may include:

  • Replacing the faulty ignition coil
  • Repairing or replacing damaged wiring and connectors
  • Reprogramming or replacing the PCM if it is found to be defective

How Much Does It Cost to Fix the P2320 Code?

The cost to fix the P2320 code can vary widely depending on the specific issue. Replacing an ignition coil typically ranges from $100 to $300, including parts and labor. If the PCM needs to be replaced or reprogrammed, costs can increase significantly.

Can I Fix the P2320 Code Myself?

If you have experience with automotive repairs and the necessary tools, you may be able to fix the P2320 code yourself. However, due to the potential complexity of diagnosing PCM issues and the need for specialized tools, it is often recommended to seek professional assistance to ensure proper repairs.

About JC Landry

JC is the Senior Editor at eManualOnline.com, GarageSpot.com, and Drive-My.com, as well as the Webmaster of TheMechanicDoctor.com, only to name a few. He's been a certified Master Mechanic for 15 years, working for various car dealers and specialized repair shops before turning towards blogging about cars and EVs in the hope of helping the next generation of automotive technicians. He also loves cats, Johnny Cash and Subarus.

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