AutoCodes – Generic – P2302

P2302 Code - Ignition Coil 'A' Secondary Circuit

Quick Answer

The current flow, or dwell, through the primary ignition coil is controlled by the Powertrain Control Module (PCM) by providing a switched ground path through the ignition coil driver to ground. Common causes include Faulty Ignition Coil 'A', Ignition Coil 'A' harness is open or shorted, Ignition Coil 'A' 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
P2302 indicates Ignition Coil 'A' Secondary Circuit.
Common causes
Common causes include Faulty Ignition Coil 'A', Ignition Coil 'A' harness is open or shorted, Ignition Coil 'A' 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 35,613
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P2302 Description

The current flow, or dwell, through the primary ignition coil is controlled by the Powertrain Control Module (PCM) by providing a switched ground path through the ignition coil driver to ground. When the ignition coil driver is switched on, current rapidly builds up to a maximum value, determined by the coil inductance and resistance. When the current is switched off, the magnetic field collapses which induces a secondary high voltage surge and the spark plug is fired. This high voltage surge creates a flyback voltage which the PCM uses as a feedback during the ignition diagnostics. The PCM continuously monitors the ignition system for concerns. The P2302 code sets when the PCM detects a short to voltage in the circuit.
OBDII Code P2302 - Ignition Coil 'A' Secondary Circuit - AutoCodes.com
P2302 Code - Ignition Coil 'A' Secondary Circuit

What are the Possible Causes of the DTC P2302?

  • Faulty Ignition Coil 'A'
  • Ignition Coil 'A' harness is open or shorted
  • Ignition Coil 'A' circuit poor electrical connection

How to Fix the DTC P2302?

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 P2302 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 P2302 code?

Need more information on how to fix the P2302 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2302 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

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 P2302 Code

1. What are the common symptoms of OBDII code P2302 related to the Ignition Coil 'A' Secondary Circuit?

- Common symptoms include engine misfires, rough idling, loss of power, and in some cases, the Check Engine Light might illuminate.

2. What are the possible causes of OBDII code P2302?

- The code P2302 can be triggered by issues such as a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, or a problem with the Engine Control Module (ECM).

3. How can I diagnose the source of OBDII code P2302?

- To diagnose the issue, you can start by visually inspecting the ignition coil and its connections. Using a multimeter, you can test the resistance of the ignition coil to determine if it is faulty.

4. Can a bad spark plug cause OBDII code P2302 to appear?

- Yes, a bad spark plug can potentially cause the ignition coil to malfunction, leading to the OBDII code P2302. It is recommended to check and replace spark plugs if necessary.

5. Is it safe to continue driving with OBDII code P2302 present?

- It is not recommended to continue driving with OBDII code P2302 present, as it can lead to further engine damage and potential safety hazards. It is best to address the issue promptly.

6. What is the typical repair process for OBDII code P2302?

- The typical repair process involves identifying the faulty component (usually the ignition coil), replacing it if necessary, and clearing the error code with an OBDII scanner.

7. Can I reset the OBDII code P2302 without fixing the underlying issue?

- While you can clear the error code temporarily using an OBDII scanner, it is crucial to address the root cause of the problem to prevent the code from reappearing.

8. Are there any preventive maintenance tips to avoid OBDII code P2302 in the future?

- Regularly inspecting and maintaining the ignition system components, such as the ignition coil and spark plugs, can help prevent issues that lead to OBDII code P2302.

9. How much does it typically cost to repair OBDII code P2302 at a mechanic or dealership?

- The cost of repairing OBDII code P2302 can vary depending on the specific cause of the issue, but it generally ranges from $100 to $300 for parts and labor.

10. Can I fix OBDII code P2302 myself, or should I seek professional help?

- If you have experience working on automotive electrical systems, you may attempt to diagnose and fix OBDII code P2302 yourself. However, if you are unsure or lack the necessary tools, it is advisable to seek professional help to ensure the issue is resolved correctly.

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