P1368 – OBD-II DTC

OBD-II DTC P1368 – Ignition Coil D Secondary Circuit Malfunction

DTC P1368 meaning

DTC P1368 refers to a malfunction in the secondary circuit of the ignition coil D. This code indicates that the Engine Control Module (ECM) has detected an issue with the electrical circuit that powers the ignition coil responsible for firing the engine’s cylinders. The secondary circuit is crucial for the proper functioning of the ignition system, as it helps to generate the high voltage needed to ignite the air-fuel mixture in the combustion chamber.

DTC P1368 symptoms

Common symptoms associated with DTC P1368 may include:

• Engine misfires
• Rough idling
• Decreased engine performance
• Difficulty starting the engine
• Illuminated check engine light

DTC P1368 causes

Several factors can lead to the triggering of DTC P1368, including:

• Faulty ignition coil D
• Damaged wiring or connectors in the ignition circuit
• Short circuits or open circuits in the secondary ignition circuit
• Faulty Engine Control Module (ECM)
• Issues with the power supply to the ignition coil

DTC P1368 seriousness

DTC P1368 is considered a serious issue as it can lead to engine performance problems. If left unaddressed, it may result in further damage to the ignition system or other engine components. Continuous misfiring can also lead to increased emissions and potential damage to the catalytic converter. Therefore, it is important to diagnose and repair the issue promptly.

How to diagnose DTC P1368

To diagnose DTC P1368, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P1368 code.
2. Inspect the ignition coil D and its wiring for any visible damage or corrosion.
3. Check the electrical connections to ensure they are secure and free of debris.
4. Test the ignition coil D using a multimeter to check for proper resistance and functionality.
5. Examine the ECM for any signs of malfunction or error codes related to the ignition system.
6. Perform a continuity test on the wiring harness to identify any shorts or opens.

How to fix DTC P1368 step-by-step instructions

To fix DTC P1368, follow these step-by-step instructions:

1. Disconnect the negative battery terminal to ensure safety.
2. Inspect and repair any damaged wiring or connectors in the ignition circuit.
3. If the ignition coil D is faulty, replace it with a new one.
4. Reconnect all electrical connections securely.
5. Reconnect the negative battery terminal.
6. Clear the DTC using an OBD-II scanner.
7. Start the engine and monitor for any reoccurrence of the code or symptoms.

How to erase DTC P1368

To erase DTC P1368, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the “Erase Codes” or “Clear DTCs” option on the scanner.
4. Confirm the action to clear the trouble codes.
5. Disconnect the scanner and start the engine to ensure the code does not return.

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