WOMS
P code powertrain Medium severity

P06CC Cylinder 8 Glow Plug Incorrect

The OBD2 code P06CC indicates that the engine control module has detected an issue with the glow plug for cylinder 8, specifically that it is not functioning correctly or is not providing the expected performance

Definition

The OBD2 code P06CC indicates that the engine control module has detected an issue with the glow plug for cylinder 8, specifically that it is not functioning correctly or is not providing the expected performance

Common causes

  • Faulty glow plug
  • Poor electrical connection
  • Damaged wiring or harness
  • Failed glow plug relay
  • Engine control module (ECM) issues
  • Incorrect glow plug type or specification
  • Short circuit in the glow plug circuit
  • Open circuit in the glow plug circuit

Common misdiagnoses

  • Faulty glow plug
  • Glow plug control module failure
  • Wiring issues or short circuits
  • Engine control module (ECM) malfunction
  • Fuel injector problems
  • Compression issues in the cylinder
  • Incorrect fuel type or quality
  • Intake or exhaust system blockages

Troubleshooting steps

  1. 1. Check for Additional Codes

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

  2. 2. Inspect Glow Plug

  3. 3. Locate the glow plug for cylinder 8 and visually inspect it for any signs of damage, corrosion, or disconnection

  4. 4. Use a multimeter to test the resistance of the glow plug. A typical glow plug should have a resistance of around 0.5 to 5 ohms. If the resistance is significantly higher or shows an open circuit, the glow plug may be faulty and should be replaced

  5. 5. Check Glow Plug Relay

  6. 6. Inspect the glow plug relay for proper operation. A malfunctioning relay can prevent the glow plugs from receiving power

  7. 7. Test the relay by applying power directly to it and checking if it activates the glow plugs

  8. 8. Inspect Wiring and Connectors

  9. 9. Check the wiring and connectors leading to the glow plug for any signs of damage, fraying, or corrosion. Poor connections can lead to incorrect operation

  10. 10. Ensure that all connections are secure and free of dirt or moisture

  11. 11. Test Glow Plug Control Module

  12. 12. If your vehicle is equipped with a glow plug control module, test it to ensure it is functioning correctly. This module controls the timing and duration of the glow plug operation

  13. 13. Check for any fault codes related to the control module

  14. 14. Check Engine Control Module (ECM)

  15. 15. In some cases, the ECM may have a fault that is causing the incorrect glow plug code. Ensure that the ECM is functioning properly and is up to date with the latest software

  16. 16. Clear Codes and Test Drive

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

  18. 18. Take the vehicle for a test drive to see if the code reappears. Monitor the engine performance and starting conditions

  19. 19. Consult Repair Manual

  20. 20. Refer to the vehicle’s repair manual for specific diagnostic procedures and specifications related to the glow plug system for your particular make and model

  21. 21. Seek Professional Help

  22. 22. If you are unable to resolve the issue after performing these steps, it may be best to consult a professional mechanic or technician who has experience with diesel engines and glow plug systems. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the P06CC code