how to resolve check engine light P0301 code in Honda Accord 10th Generation (2018-2022)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal for safety.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the engine cover if necessary.
• Locate the spark plug for cylinder 1 (refer to the owner’s manual for location).
• Remove the spark plug wire or ignition coil connector.
• Use the spark plug socket to carefully unscrew the old spark plug.
• Inspect the old spark plug for signs of wear (e.g., carbon buildup).
• Install the new spark plug and torque it to the manufacturer's specification (typically 13-15 lb-ft).
• Reconnect the spark plug wire or ignition coil.

3. Check and Replace Ignition Coil

• Tools Required: Socket set, torque wrench
• Remove the ignition coil retaining bolts and disconnect the electrical connector.
• Carefully pull out the ignition coil from the cylinder head.
• Inspect for cracks or damage.
• Install the new ignition coil and torque the bolts to manufacturer's specification (typically 7-9 lb-ft).
• Reconnect the electrical connector.

4. Inspect and Clean/Replace Fuel Injector

• Tools Required: Fuel injector removal tool, socket set
• Relieve the fuel system pressure by removing the fuel pump fuse and running the engine until it stalls.
• Disconnect the fuel lines and electrical connector from the injector.
• Remove the fuel injector retaining clips and carefully extract the injector.
• Inspect for clogs, and clean or replace as necessary.
• Reinstall the injector, securing it with clips, and reconnect the fuel lines.

5. Verify Compression

• Tools Required: Compression tester
• Remove the spark plug for cylinder 1.
• Insert the compression tester into the spark plug hole.
• Crank the engine several times to obtain a reading.
• Compare the compression reading to specifications (typically around 180-200 psi). If compression is low, further engine diagnostics may be needed.