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P2335 Ignition Coil "L" Secondary Circuit

The OBD2 code P2335 indicates a malfunction in the secondary circuit of the ignition coil "L," which can result in misfires or poor engine performance

Definition

The OBD2 code P2335 indicates a malfunction in the secondary circuit of the ignition coil "L," which can result in misfires or poor engine performance

Common causes

  • Faulty ignition coil "L"
  • Damaged wiring or connectors in the ignition circuit
  • Poor electrical connections
  • Faulty engine control module (ECM)
  • Short circuit in the ignition coil circuit
  • Open circuit in the ignition coil circuit
  • Faulty spark plug or spark plug wire
  • Grounding issues in the ignition system

Common misdiagnoses

  • Faulty ignition coil
  • Bad spark plugs
  • Ignition module issues
  • Wiring or connector problems
  • Engine control module (ECM) failure
  • Fuel system issues
  • Vacuum leaks
  • Timing belt or chain problems

Troubleshooting steps

  1. 1. Visual Inspection

    Check Wiring and Connectors: Inspect the wiring harness and connectors associated with the ignition coil "L" for any signs of damage, corrosion, or loose connections

  2. 2. Look for Shorts or Open Circuits

    Ensure there are no shorts to ground or open circuits in the wiring

  3. 3. Check the Ignition Coil

    Test the Ignition Coil: Use a multimeter to test the resistance of the ignition coil. Compare the readings to the specifications provided in the vehicle's service manual

  4. 4. Swap Ignition Coils

    If possible, swap the ignition coil "L" with another coil (if the vehicle has multiple coils) to see if the code follows the coil. If it does, the coil may be faulty

  5. 5. Inspect Spark Plugs

    Check Spark Plugs: Inspect the spark plugs for wear or damage. Replace them if they are worn out or fouled

  6. 6. Ensure Proper Gap

    Make sure the spark plugs are gapped correctly according to the manufacturer's specifications

  7. 7. Check for Vacuum Leaks

    Inspect for Leaks: Vacuum leaks can affect engine performance and may trigger ignition-related codes. Check hoses and intake manifold gaskets for leaks

  8. 8. Test the Power and Ground

    Check Power Supply: Use a multimeter to ensure that the ignition coil is receiving the proper voltage from the power source

  9. 9. Check Ground Connection

    Verify that the ignition coil has a good ground connection

  10. 10. Scan for Additional Codes

    Check for Other Codes: Use an OBD-II scanner to check for any other related trouble codes that may provide additional insight into the problem

  11. 11. Inspect the Engine Control Module (ECM)

    Check ECM Functionality: If all other components are functioning correctly, the issue may lie with the ECM. Ensure that it is operating properly and that there are no software issues

  12. 12. Clear Codes and Test Drive

    Clear the Codes: After performing the necessary repairs, clear the trouble codes using an OBD-II scanner

  13. 13. Test Drive the Vehicle

    Take the vehicle for a test drive to see if the code reappears

  14. 14. Consult a Professional

    If the issue persists after performing these steps, it may be best to consult a professional mechanic for further diagnosis and repair. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the P2335 code. Always refer to the vehicle's service manual for specific procedures and specifications