P231E: Ignition Coil 'D' Secondary Circuit High

Definition

The OBD2 code P231E indicates that there is a high voltage detected in the secondary circuit of ignition coil 'D', which may suggest a malfunction in the ignition coil or related wiring

Common causes

Faulty ignition coil 'D'
Open or shorted wiring in the ignition coil circuit
Poor electrical connections or corroded terminals
Faulty engine control module (ECM)
High resistance in the ignition coil circuit
Faulty spark plug or spark plug wire
Issues with the power supply to the ignition coil

Common misdiagnoses

Faulty ignition coil
Bad spark plugs
Wiring issues or shorts
Faulty engine control module (ECM)
Fuel injector problems
Vacuum leaks
Faulty crankshaft or camshaft position sensors
Incorrectly installed ignition components
Battery or charging system issues
Engine misfire or timing issues

Troubleshooting steps

1. Check for Additional Codes

Before proceeding, check for any other related trouble codes that may provide more context to the issue
2. Visual Inspection
3. Inspect the ignition coil 'D' and its wiring for any visible damage, such as frayed wires, corrosion, or loose connections
4. Check the connectors for signs of wear or damage
5. Test the Ignition Coil
6. Use a multimeter to measure the resistance of the ignition coil. Compare the readings to the specifications provided in the vehicle's service manual
7. If the resistance is outside the specified range, the ignition coil may be faulty and should be replaced
8. Check the Power and Ground
9. Verify that the ignition coil is receiving the correct voltage. Use a multimeter to check for power at the coil connector while the ignition is on
10. Check the ground connection for the ignition coil. A poor ground can cause high resistance and trigger the code
11. Inspect the Ignition Control Module (ICM)
12. If applicable, check the ignition control module for proper operation. A malfunctioning ICM can affect the ignition coil's performance
13. Examine the PCM (Powertrain Control Module)
14. Ensure that the PCM is functioning correctly. If the PCM is faulty, it may not be sending the correct signals to the ignition coil
15. Check for Short Circuits
16. Inspect the wiring harness for any short circuits or grounding issues that could cause high voltage readings
17. Look for Vacuum Leaks
18. Although not directly related to the ignition coil, vacuum leaks can cause engine misfires, which may trigger ignition coil codes. Inspect for any leaks in the intake system
19. Clear the Codes and Test Drive
20. After performing the necessary repairs, clear the trouble codes using an OBD-II scanner and take the vehicle for a test drive to see if the code returns
21. Consult a Professional
22. If the issue persists after performing these steps, it may be best to consult a professional mechanic for further diagnosis. By following these steps, you should be able to identify and resolve the issue related to the P231E code

Definition

Common causes

Common misdiagnoses

Troubleshooting steps

1. Check for Additional Codes

2. Visual Inspection

3. Inspect the ignition coil 'D' and its wiring for any visible damage, such as frayed wires, corrosion, or loose connections

4. Check the connectors for signs of wear or damage

5. Test the Ignition Coil

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

7. If the resistance is outside the specified range, the ignition coil may be faulty and should be replaced

8. Check the Power and Ground

9. Verify that the ignition coil is receiving the correct voltage. Use a multimeter to check for power at the coil connector while the ignition is on

10. Check the ground connection for the ignition coil. A poor ground can cause high resistance and trigger the code

11. Inspect the Ignition Control Module (ICM)

12. If applicable, check the ignition control module for proper operation. A malfunctioning ICM can affect the ignition coil's performance

13. Examine the PCM (Powertrain Control Module)

14. Ensure that the PCM is functioning correctly. If the PCM is faulty, it may not be sending the correct signals to the ignition coil

15. Check for Short Circuits

16. Inspect the wiring harness for any short circuits or grounding issues that could cause high voltage readings

17. Look for Vacuum Leaks

18. Although not directly related to the ignition coil, vacuum leaks can cause engine misfires, which may trigger ignition coil codes. Inspect for any leaks in the intake system

19. Clear the Codes and Test Drive

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

21. Consult a Professional

22. If the issue persists after performing these steps, it may be best to consult a professional mechanic for further diagnosis. By following these steps, you should be able to identify and resolve the issue related to the P231E code