WOMS
P code powertrain High severity

P1362 Ignition Coil C Secondary Circuit Malfunction

The OBD2 code P1362 indicates a malfunction in the secondary circuit of Ignition Coil C, which can lead to issues with engine performance, such as misfires or difficulty starting

Definition

The OBD2 code P1362 indicates a malfunction in the secondary circuit of Ignition Coil C, which can lead to issues with engine performance, such as misfires or difficulty starting

Common causes

  • Faulty ignition coil
  • Damaged wiring or connectors
  • Poor electrical connections
  • Failed ignition control module
  • Faulty engine control unit (ECU)
  • Short circuit in the ignition coil circuit
  • Open circuit in the ignition coil circuit
  • Faulty spark plugs or ignition leads

Common misdiagnoses

  • Faulty ignition coil
  • Bad spark plugs
  • Ignition module failure
  • Wiring issues or shorts
  • Engine control module (ECM) problems
  • Fuel injector issues
  • Vacuum leaks
  • Timing belt or chain problems
  • Crankshaft or camshaft position sensor failure
  • Battery or charging system issues

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. This can provide more context and help identify related issues

  2. 2. Inspect the Ignition Coil

  3. 3. Visually inspect the ignition coil C for any signs of damage, such as cracks, corrosion, or burnt areas

  4. 4. Ensure that the electrical connector is secure and free of corrosion or dirt

  5. 5. Test the Ignition Coil

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

  7. 7. If the resistance is out of spec, the ignition coil may need to be replaced

  8. 8. Check the Wiring and Connectors

  9. 9. Inspect the wiring harness and connectors leading to the ignition coil for any signs of damage, fraying, or short circuits

  10. 10. Repair or replace any damaged wiring or connectors

  11. 11. Test the Power and Ground

  12. 12. Use a multimeter to check for proper voltage at the ignition coil connector while the engine is running. You should see battery voltage

  13. 13. Check for a good ground connection at the ignition coil. A poor ground can cause the coil to malfunction

  14. 14. Inspect the Spark Plug

  15. 15. Remove the spark plug associated with ignition coil C and inspect it for wear or damage. Replace it if necessary

  16. 16. Ensure that the spark plug gap is set correctly according to the manufacturer's specifications

  17. 17. Check for Engine Mechanical Issues

  18. 18. Inspect for any mechanical issues that could affect ignition timing, such as a timing belt or chain that has slipped

  19. 19. Perform a compression test to ensure that the engine is in good mechanical condition

  20. 20. Clear the Codes and Test Drive

  21. 21. After performing repairs or replacements, clear the trouble codes using the OBD-II scanner

  22. 22. Take the vehicle for a test drive to see if the code returns

  23. 23. Consult a Professional

  24. 24. If the issue persists after performing these steps, it may be necessary to consult a professional mechanic for further diagnosis. They may have access to advanced diagnostic tools and techniques. By following these troubleshooting steps, you can identify and resolve the underlying issue causing the P1362 code