How to Fix P1368 Ignition Coil D Secondary Circuit Malfunction

Introduction

If you’re experiencing engine misfires, rough idling, or a decrease in fuel efficiency, it could be due to a P1368 error code. This code indicates a problem with the ignition coil D secondary circuit, which can cause a variety of issues with your vehicle’s performance. Fortunately, fixing this problem is relatively simple and can be done at home with a few basic tools.

Step 1: Check the Ignition Coil

The first step in fixing a P1368 error code is to check the ignition coil. Start by locating the coil, which is typically located near the engine block. Use a multimeter to test the resistance of the coil. The resistance should be between 0.4 and 2 ohms. If the resistance is outside of this range, the coil may need to be replaced.

Step 2: Check the Wiring

If the ignition coil is functioning properly, the next step is to check the wiring. Start by inspecting the wiring for any visible damage or wear. If the wiring appears to be in good condition, use a multimeter to test the continuity of the wiring. If there is a break in the wiring, it will need to be repaired or replaced.

Step 3: Check the Spark Plugs

If the ignition coil and wiring are both functioning properly, the next step is to check the spark plugs. Start by removing the spark plugs and inspecting them for any signs of wear or damage. If the spark plugs appear to be in good condition, use a spark plug tester to check for proper spark. If there is no spark, the spark plugs may need to be replaced.

Step 4: Check the PCM

If the ignition coil, wiring, and spark plugs are all functioning properly, the next step is to check the powertrain control module (PCM). The PCM is responsible for controlling the ignition system, so if it is malfunctioning, it can cause a P1368 error code. Use a scan tool to check for any PCM error codes. If there are no error codes, the PCM may need to be replaced.

Step 5: Replace the Faulty Component

Once you have identified the faulty component, it will need to be replaced. If the ignition coil is faulty, it will need to be replaced with a new one. If the wiring is faulty, it will need to be repaired or replaced. If the spark plugs are faulty, they will need to be replaced. If the PCM is faulty, it will need to be replaced.

Conclusion

Fixing a P1368 error code is relatively simple and can be done at home with a few basic tools. By following these steps, you can identify and fix the problem, restoring your vehicle’s performance and fuel efficiency.

FAQs

1. Can a P1368 error code cause engine damage?

While a P1368 error code itself is not likely to cause engine damage, it can indicate a problem with the ignition system that can lead to engine damage if left untreated.

2. How often should I check my ignition system?

It is recommended that you have your ignition system checked at least once a year to ensure that it is functioning properly.

3. Can I drive my vehicle with a P1368 error code?

While it is possible to drive your vehicle with a P1368 error code, it is not recommended. Ignoring the problem can lead to decreased performance and fuel efficiency, as well as potential engine damage.