P067E: Cylinder 6 Glow Plug Control Circuit Low

Definition

The OBD2 code P067E indicates a low voltage or malfunction in the glow plug control circuit for cylinder 6, suggesting that the glow plug may not be heating properly or there is an issue with the circuit

Common causes

Faulty glow plug
Damaged wiring or connectors
Failed glow plug control module
Poor electrical connections
Blown fuse
Short circuit in the glow plug circuit
Engine control module (ECM) issues

Common misdiagnoses

Faulty glow plug
Bad glow plug relay
Wiring issues or short circuits
Engine control module (ECM) failure
Fuel injector problems
Compression issues in the cylinder
Incorrectly diagnosed as a fuel system issue
Misfiring cylinder due to unrelated ignition problems

Troubleshooting steps

1. Check the Code

Use an OBD-II scanner to confirm the P067E code and check for any additional codes that may provide more context about the issue
2. Visual Inspection
3. Inspect the wiring and connectors associated with the glow plug for cylinder 6. Look for any signs of damage, corrosion, or loose connections
4. Check the glow plug itself for any physical damage or wear
5. Test the Glow Plug
6. Disconnect the glow plug and test its resistance using a multimeter. A typical glow plug should have a resistance reading within the manufacturer's specified range (usually a few ohms). If the resistance is too high or infinite, the glow plug may be faulty and should be replaced
7. Check the Glow Plug Relay
8. Inspect the glow plug relay for proper operation. You can test the relay by applying power to it and checking if it activates. If the relay is faulty, it may need to be replaced
9. Measure Voltage at the Glow Plug
10. With the ignition on (but the engine off), measure the voltage at the glow plug connector. You should see battery voltage (around 12V). If the voltage is low or absent, there may be an issue with the wiring or the relay
11. Inspect the Glow Plug Control Module
12. If your vehicle has a glow plug control module, check for any faults or issues with it. This module controls the operation of the glow plugs and may need to be tested or replaced if faulty
13. Check for Short Circuits
14. Inspect the wiring for any short circuits to ground or other wires that could cause low voltage readings. Use a multimeter to check for continuity where it shouldn't be
15. Clear the Codes
16. After performing repairs or replacements, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns
17. Consult the Service Manual
18. Refer to the vehicle's service manual for specific diagnostic procedures and specifications related to the glow plug system
19. Seek Professional Help
20. If you are unable to diagnose or fix the issue after these steps, consider seeking help from a professional mechanic who has experience with diesel engines and glow plug systems. By following these steps, you should be able to identify and resolve the issue related to the P067E code

Definition

Common causes

Common misdiagnoses

Troubleshooting steps

1. Check the Code

2. Visual Inspection

3. Inspect the wiring and connectors associated with the glow plug for cylinder 6. Look for any signs of damage, corrosion, or loose connections

4. Check the glow plug itself for any physical damage or wear

5. Test the Glow Plug

6. Disconnect the glow plug and test its resistance using a multimeter. A typical glow plug should have a resistance reading within the manufacturer's specified range (usually a few ohms). If the resistance is too high or infinite, the glow plug may be faulty and should be replaced

7. Check the Glow Plug Relay

8. Inspect the glow plug relay for proper operation. You can test the relay by applying power to it and checking if it activates. If the relay is faulty, it may need to be replaced

9. Measure Voltage at the Glow Plug

10. With the ignition on (but the engine off), measure the voltage at the glow plug connector. You should see battery voltage (around 12V). If the voltage is low or absent, there may be an issue with the wiring or the relay

11. Inspect the Glow Plug Control Module

12. If your vehicle has a glow plug control module, check for any faults or issues with it. This module controls the operation of the glow plugs and may need to be tested or replaced if faulty

13. Check for Short Circuits

14. Inspect the wiring for any short circuits to ground or other wires that could cause low voltage readings. Use a multimeter to check for continuity where it shouldn't be

15. Clear the Codes

16. After performing repairs or replacements, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns

17. Consult the Service Manual

18. Refer to the vehicle's service manual for specific diagnostic procedures and specifications related to the glow plug system

19. Seek Professional Help

20. If you are unable to diagnose or fix the issue after these steps, consider seeking help from a professional mechanic who has experience with diesel engines and glow plug systems. By following these steps, you should be able to identify and resolve the issue related to the P067E code