how to fix P0301 code in Honda Accord 10th Generation (2018-2022)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the ignition coil from cylinder 1 by unscrewing the retaining bolts and disconnecting the electrical connector.
• Carefully pull out the old spark plug using a spark plug socket.
• Inspect the spark plug for signs of wear or damage.
• Install a new spark plug, ensuring it is gapped to manufacturer specifications (typically around 0.044 inches for Honda).
• Apply dielectric grease to the coil boot before reinstalling the ignition coil.

3. Inspect/Replace Ignition Coil

• Tools Required: Socket set.
• If the ignition coil shows signs of damage, replace it with a new one.
• Remove the faulty ignition coil and install the new coil, securing it with bolts and reconnecting the electrical connector.

4. Inspect/Replace Fuel Injector

• Tools Required: Fuel injector removal tool, socket set.
• If the fuel injector is clogged or defective, remove it by disconnecting the fuel lines and electrical connectors.
• Replace it with a new injector, ensuring all connections are secure.

5. Check Compression (if necessary)

• Tools Required: Compression tester.
• If previous steps do not resolve the issue, perform a compression test on cylinder 1.
• If compression is low, further diagnosis is required to identify possible internal engine problems (e.g., valve issues, head gasket failure).