how to fix P0301 code in Honda CR-V Sixth Generation (2023-present)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery to ensure safety.
• Allow the engine to cool before beginning repairs.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 1.
• Using a spark plug socket, remove the spark plug from cylinder 1.
• Inspect the spark plug for wear, carbon buildup, or damage. Replace if necessary.
• Install a new spark plug, ensuring it is gapped correctly according to manufacturer specifications (typically 0.044 inches for most Honda models).
• Torque the spark plug to the manufacturer's specification (usually 13 lb-ft).

3. Check and Replace Ignition Coil

• If the spark plug is in good condition, inspect the ignition coil for cracks or electrical shorts.
• Test the ignition coil with a multimeter for proper resistance. Replace if it’s out of specification.
• Install the new ignition coil onto the spark plug and reconnect the electrical connector.

4. Inspect and Replace Fuel Injector

• If misfire persists, check the fuel injector for cylinder 1. Disconnect the fuel injector connector and remove it.
• Using a multimeter, test the injector for resistance. If it’s defective, replace it.
• Install the new fuel injector, making sure it is seated properly, and reconnect the wiring harness.

5. Perform Compression Test

• If the issue continues, perform a compression test on cylinder 1.
• If compression is low, diagnose further for possible internal engine problems such as valve issues or head gasket failure.

6. Final Assembly and Testing

• Reconnect the negative terminal of the battery.
• Start the engine and allow it to reach operating temperature.
• Monitor for any check engine light illumination or misfire symptoms.